UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM10-K/A

(Amendment No. 1) 10-K

(Mark One)

For the fiscal year ended December 31, 20182021

or

For the transition period fromto

333-207132-14

(Commission File Number of issuing entity)

0001715824

(Central Index Key Number of issuing entity)

Citigroup Commercial Mortgage Trust2017-P8

(Exact name of issuing entity as specified in its charter)

333-207132

(Commission File Number of depositor)

0001258361

(Central Index Key Number of depositor)

Citigroup Commercial Mortgage Securities Inc.

(Exact name of depositor as specified in its charter)

Citi Real Estate Funding Inc.

(Central Index Key Number: 0001701238)

Barclays Bank PLC

(Central Index Key Number: 0000312070)

Macquarie US Trading LLC d/b/a Principal Commercial Capital

(Central Index Key Number: 0001634437)

Starwood Mortgage Funding V LLC

(Central Index Key Number: 0001682509)

Citigroup Global Markets Realty Corp.

(Central Index Key Number: 0001541001)

(Exact name of sponsor as specified in its charter)

c/o Citibank, N.A.

388 Greenwich Street, 14^th Floor

New York, New York 10013

(Address of principal executive offices of issuing entity)

(212)816-5614

Registrant’s telephone number, including area code

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to sectionSection 12(g) of the Act:  None.

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    ☐  Yes    ☒  No

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    ☐  Yes    ☒  No

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    ☒  Yes    ☐  No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of RegulationS-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Not Applicable

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of RegulationS-K (§ 229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form10-K or any amendment to this Form10-K.

Not Applicable

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, anon-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.     ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule12b-2 of the Act).    ☐  Yes    ☒  No

State the aggregate market value of the voting andnon-voting common equity held bynon-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant’s most recently completed second fiscal quarter.

Not Applicable

Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Section 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court.

Not Applicable

Indicate the number of shares outstanding of each of the registrant’s classes of common stock, as of the latest practicable date.

Not Applicable

DOCUMENTS INCORPORATED BY REFERENCE

List hereunder the following documents if incorporated by reference and the Part of the Form10-K (e.g., Part I, Part II, etc.) into which the document is incorporated: (1) Any annual report to security holders; (2) Any proxy or information statement; and (3) Any prospectus filed pursuant to Rule 424(b) or (c) under the Securities Act of 1933. The listed documents should be clearly described for identification purposes (e.g., annual report to security holders for fiscal year ended December 24, 1980).

Not Applicable

EXPLANATORY NOTES

The purpose of this Amendment No. 1 (the “Amendment”) to our Annual Report on Form10-K for the fiscal year ended December 31, 2018, as filed with the Securities and Exchange Commission (the “Commission”) on March 29, 2019 under Commission FileNo. 333-207132-14 (the “Original Form10-K”), is to file with the Commission: (i) a revised report on assessment of compliance with servicing criteria for asset-backed securities of Rialto Capital Advisors, LLC as Exhibits 33.23, 33.39, 33.46 and 33.53 as a replacement of the report on assessment of compliance filed as Exhibits 33.23, 33.39, 33.46 and 33.53 to the Original Form10-K; and (ii) a revised attestation report on assessment of compliance with servicing criteria for asset-backed securities for Rialto Capital Advisors, LLC as Exhibits 34.23, 34.39, 34.46 and 34.53, as a replacement of the attestation report on assessment of compliance with servicing criteria for asset-backed securities filed as Exhibits 34.23, 34.39, 34.46 and 34.53 to the Original Form10-K. No other changes have been made to the Original Form10-K other than the changes described above.

PART I

Item 1. Business.

Omitted.

Item 1A. Risk Factors.

Omitted.

Item 1B. Unresolved Staff Comments.

None.

Item 2. Properties.

Omitted.

Item 3. Legal Proceedings.

Omitted.

Item 4. Mine Safety Disclosures.

Not applicable.

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Omitted.

Item 6. Selected Financial Data.[Reserved]

Omitted.

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Omitted.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

Omitted.

Item 8. Financial Statements and Supplementary Data.

Omitted.

Item 9. Changes in and Disagreements With Accountants on Accounting and Financial Disclosure.

Omitted.

Item 9A. Controls and Procedures.

Omitted.

Item 9B. Other Information.

None.

PART III

Item 10. Directors, Executive Officers and Corporate Governance.

Omitted.

Item 11. Executive Compensation.

Omitted.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

Omitted.

Item 13. Certain Relationships and Related Transactions, and Director Independence.

Omitted.

Item 14. Principal AccountingAccountant Fees and Services.

Omitted.

ADDITIONAL DISCLOSURE ITEMS REQUIRED BY GENERAL INSTRUCTION J(2)

Item 1112(b) of Regulation AB

No mortgage loan in the pool assets for Citigroup Commercial Mortgage Trust2017-P8 constitutes a significant obligor within the meaning of Item 1101(k)(2) of Regulation AB.

Item 1114(b)(2) and Item 1115(b) of Regulation AB

No entity or group of affiliated entities provides any external credit enhancement, uses any derivative instruments or other support for the certificates within this transaction.

Item 1117 of Regulation AB

Disclosure from Citibank, N.A., as Certificate Administrator:

Citibank, N.A. (“Citibank”) is acting as the Certificate Administrator of this commercial mortgage-backed securities (“CMBS”) transaction. In the ordinary course of business, Citibank is involved in a number of legal proceedings, including in connection with its role as trustee of certain residential mortgage-backed securities (“RMBS”) transactions. Certain of these Citibank as trustee-related matters are disclosed herein.

On June 18, 2014, a civil action was filed against Citibank in the Supreme Court of the State of New York by a group of investors in 48 private-label RMBS trusts for which Citibank allegedly serves or did serve as trustee, asserting claims for purported violations of the Trust Indenture Act of 1939 (the “Trust Indenture Act”), breach of contract, breach of fiduciary duty and negligence based on Citibank’s alleged failure to perform its duties as trustee for the 48 RMBS trusts. On November 24, 2014, plaintiffs sought leave to withdraw this action. On the same day, a smaller subset of similar plaintiff investors in 27 private-label RMBS trusts for which Citibank allegedly serves or did serve as trustee, filed a new civil action against Citibank in the United States District Court for the Southern District of New York asserting similar claims as the prior action filed in state court. In January 2015, the court closed plaintiffs’ original state court action. On September 8, 2015, the federal court dismissed all claims as to 24 of the 27 trusts and allowed certain of the claims to proceed as to the other three trusts. Subsequently, plaintiffs voluntarily dismissed all claims with respect to two of the three trusts. On April 7, 2017, Citibank filed a motion for summary judgment. Plaintiffs filed its consolidated opposition brief and cross motion for partial summary judgment on May 22, 2017. Briefing on those motions was completed on August 4, 2017. On March 22, 2018, the court granted Citibank’s motion for summary judgment in its entirety, denied Plaintiffs’ motion for summary judgment and ordered the clerk to close the case. On April 20, 2018, plaintiffs filed a notice of appeal. Plaintiffs’ opening brief was filed on August 3, 2018. Citibank filed its opposition on November 2, 2018. Plaintiffs’ filed their reply on November 16, 2018.

On November 24, 2015, the same investors that brought the federal case brought a new civil action in the Supreme Court of the State of New York related to 25 private-label RMBS trusts for which Citibank allegedly serves or did serve as trustee. This case includes the 24 trusts previously dismissed in the federal action, and one additional trust. The investors assert claims for breach of contract, breach of fiduciary duty, breach of duty to avoid conflicts of interest, and violation of New York’s Streit Act (the “Streit Act”). Following oral argument on Citibank’s motion to dismiss, plaintiffs filed an amended complaint on August 5, 2016. On June 27, 2017, the state court issued a decision, dismissing the event of default claims, mortgage-file-related claims, the fiduciary duty claims, and the conflict of interest claims. The decision sustained certain breach of contract claims including the claim alleging discovery of breaches of representations and warranties, a claim related to robo-signing, and the implied covenant of good faith claim. Citibank appealed the lower court’s decision, and on January 16, 2018, the Appellate Division, First Department, dismissed the claims related to robo-signing and the implied covenant of good faith, but allowed plaintiffs’ claim alleging discovery of breaches of representations and warranties to proceed.

On August 19, 2015, the Federal Deposit Insurance Corporation (“FDIC”) as receiver for a failed financial institution filed a civil action against Citibank in the Southern District of New York. This action relates to one private-label RMBS trust for which Citibank formerly served as trustee. FDIC asserts claims for breach of contract, violation of the Streit Act, and violation of the Trust Indenture Act. Citibank jointly briefed a motion to dismiss with The Bank of New York Mellon and U.S. Bank, N.A., entities that have also been sued by FDIC in their capacity as trustee, and these cases have all been consolidated in front of Judge Carter. On September 30, 2016, the court granted the motion to dismiss without prejudice for lack of subject matter jurisdiction. On October 14, 2016, FDIC filed a motion for reargument or relief from judgment from the court’s dismissal order. On July 11, 2017, Judge Carter ruled on the motion for reconsideration regarding his dismissal of the action. He denied reconsideration of his decision on standing, but granted leave to amend the complaint by October 9, 2017. The FDIC subsequently requested an extension of time to file its amended complaint, which was granted. The FDIC filed its amended complaint on December 8, 2017. Defendants jointly filed a motion to dismiss the amended complaint on March 13, 2018. On April 18, 2018, plaintiff filed its opposition. Defendants filed their joint reply on May 3, 2018.

There can be no assurances as to the outcome of litigation or the possible impact of litigation on the trustee or the RMBS trusts. However, Citibank denies liability and continues to vigorously defend against these litigations. Furthermore, neither the above-disclosed litigations nor any other pending legal proceeding involving Citibank will materially affect Citibank’s ability to perform its duties as Certificate Administrator under the pooling and servicing agreement for this CMBS transaction.

Disclosure from Wells Fargo Bank, National Association as certificate administrator and(“Wells Fargo Bank”) (i) as custodian for the 225 & 233 Park Avenue South mortgage loan under the WFCM2017-C39 PSA, (ii) as custodian for the General Motors Building mortgage loan under the BXP2017-GM TSA, (iii) as custodian for the Mall of Louisiana mortgage loan under the BANK 2017-BNK7 PSA, (iv) as trustee and custodian for the Starwood Capital Group Hotel Portfolio mortgage loan under the DBJPM2017-C6 PSA, (v) as custodian for the Long Island Prime Portfolio—Uniondale mortgage loan under the GSMS2017-GS7 PSA, (vi) as custodian for the Atlanta and Anchorage Hotel Portfolio mortgage loan under the CFCRE2017-C8 PSA and (vii) as custodian for the 245 Park Avenue mortgage loan under the 245 Park Avenue Trust 2017-245P TSA:

Since June 18,In December 2014, a group of institutional investors havePhoenix Light SF Limited and certain related entities and the National Credit Union Administration (NCUA) filed civil complaints in the Supreme Court of the State of New York, New York County, and later the U.S.United States District Court for the Southern District of New York against Wells Fargo Bank, N.A., (“alleging claims against Wells Fargo Bank”)Bank in its capacity as trustee for certaina number of residential mortgage backedmortgage-backed securities (“RMBS”) trusts. The complaints againstComplaints raising similar allegations have been filed by Commerzbank AG in the Southern District of New York and by IKB International and IKB Deutsche Industriebank in New York state court. In each case, the plaintiffs allege that Wells Fargo Bank, alleged that theas trustee, caused losses to investors, and assertedplaintiffs assert causes of action based upon, among other things, the trustee’s alleged failure to: (i)to notify and enforce repurchase obligations of mortgage loan sellers for purported breaches of representations and warranties, (ii) notify investors of alleged events of default, and (iii) abide by appropriate standards of care following alleged events of default. Relief sought included money damagesWells Fargo Bank previously settled two class action

lawsuits with similar allegations that were filed in November 2014 and December 2016 by institutional investors in the Southern District of New York and New York state court, respectively. In addition, Park Royal I LLC and Park Royal II LLC have filed complaints in New York state court alleging Wells Fargo Bank, N.A., as trustee, failed to take appropriate actions upon learning of defective mortgage loan documentation. In March 2021, the Company entered into an unspecified amount, reimbursementagreement to resolve the case filed by the NCUA.

In addition to the foregoing cases, in August 2014 and August 2015 Nomura Credit & Capital Inc. (“Nomura”) and Natixis Real Estate Holdings, LLC (“Natixis”) filed a total of expenses,seven third-party complaints against Wells Fargo Bank in New York state court. In the underlying first-party actions, Nomura and equitable relief.Natixis have been sued for alleged breaches of representations and warranties made in connection with residential mortgage-backed securities sponsored by them. In the third-party actions, Nomura and Natixis allege that Wells Fargo Bank, as master servicer, primary servicer or securities administrator, failed to notify Nomura and Natixis of their own breaches, failed to properly oversee the primary servicers, and failed to adhere to accepted servicing practices. Natixis additionally alleges that Wells Fargo Bank failed to perform default oversight duties. Wells Fargo Bank has reached an agreement, in which it denies any wrongdoing,asserted counterclaims alleging that Nomura and Natixis failed to resolve these claims on a classwide basis for the 271 RMBS trusts currently at issue. The settlement agreement is subject to court approval. Separate lawsuits againstprovide Wells Fargo Bank making similar allegations filed by certain other institutional investors concerning 57 RMBS trusts in New York federalnotice of their representation and state court are not covered by the agreement. warranty breaches.

With respect to each of the foregoing litigations, Wells Fargo Bank believes plaintiffs’plaintiffs' claims are without merit and intends to contest the claims vigorously, but there can be no assurances as to the outcome of the litigations or the possible impact of the litigations on Wells Fargo Bank or the related RMBS trusts.

Disclosure from Deutsche Bank Trust Company Americas, as trustee and as custodian under (i) the CGCMT2017-B1 PSA pursuant to which the Lakeside Shopping Center mortgage loan is serviced and (ii) the CGCMT2017-P7 PSA pursuant to which the Scripps Center mortgage loan is serviced:

Deutsche Bank Trust Company Americas (“DBTCA”) and Deutsche Bank National Trust Company (“DBNTC”) have been sued by investors in civil litigation concerning their role as trustees of certain residential mortgage-backed securities (“RMBS”) trusts.

On June 18, 2014, a group of investors, including funds managed by Blackrock Advisors, LLC, PIMCO-Advisors, L.P., and others, filed an action against DBNTC and DBTCA in New York State Supreme Court alleging that DBNTC and DBTCA failed to perform purported duties, as trustees for 544 private-label RMBS trusts, to enforce breaches of representations and warranties as to mortgage loans held by the trusts and to enforce breaches by servicers of their mortgage loan servicing obligations for the trusts. During the course of the litigation, plaintiffs dismissed the case from New York State Supreme Court and refiled two separate cases, one in the U.S. District Court for the Southern District of New York (the “BlackRockSDNY Case”) and the other in the Superior Court of California, Orange County (the “BlackRockCalifornia Case”). Pursuant to a settlement among the parties, theBlackRockSDNY Case was dismissed on December 6, 2018 and theBlackRockCalifornia Case was dismissed on January 11, 2019.

On September 27, 2017, DBTCA was added as a defendant to a case brought by certain special purpose entities including Phoenix Light SF Limited in the U.S. District Court for the Southern District of New York, in which the plaintiffs previously alleged incorrectly that DBNTC served as trustee for all 43 of the trusts at issue. On September 27, 2017, plaintiffs filed a third amended complaint that names DBTCA as a defendant in addition to DBNTC. DBTCA serves as trustee for one of the 43 trusts at issue. DBNTC serves as trustee for the other 42 trusts at issue. Plaintiffs’ third amended complaint brings claims for violation of the U.S. Trust Indenture Act of 1939 (“TIA”); breach of contract; breach of fiduciary duty; negligence and gross negligence; violation of New York’s Streit Act (the “Streit Act”); and breach of the covenant of good faith. However, in the third amended complaint, plaintiffs acknowledge that, before DBTCA was added to the case, the court dismissed plaintiffs’ TIA Act claims, negligence and gross negligence claims, Streit Act claims, claims for breach of the covenant of good faith, and certain theories of plaintiffs’ breach of contract claims, and plaintiffs only include these claims to preserve any rights on appeal. Plaintiffs allege damages of “hundreds of millions of dollars.” On November 13, 2017, DBNTC and DBTCA filed an answer to the third amended complaint. On December 7, 2018, DBNTC and DBTCA filed a motion for summary judgment. Also on December 7, 2018, plaintiffs, jointly with Commerzbank AG (see description ofCommerzbank case below), filed a motion for partial summary judgment.

On November 30, 2017, DBTCA was added as a defendant to a case brought by Commerzbank AG (“Commerzbank”) in the U.S. District Court for the Southern District of New York, in which Commerzbank previously alleged incorrectly that DBNTC served as trustee for all 50 of the trusts at issue. On November 30, 2017, Commerzbank filed a second amended complaint that names DBTCA as a defendant in addition to DBNTC. DBTCA serves as trustee for one of the 50 trusts at issue. DBNTC serves as trustee for the other 49 trusts at issue. Commerzbank’s second amended complaint brings claims for violation of the TIA; breach of contract; breach of fiduciary duty; negligence; violation of the Streit Act; and breach of the covenant of good faith. However, in the second amended complaint, Commerzbank acknowledges that, before DBTCA was added to the case, the court dismissed Commerzbank’s TIA claims for the trusts governed by pooling and servicing agreements, as well as its Streit Act claims and claims for breach of the covenant of good faith, and Commerzbank only includes these claims to preserve any rights on appeal. The second amended complaint alleges that DBNTC and DBTCA caused Commerzbank to suffer “hundreds of millions of dollars in losses,” but the complaint does not include a demand for money damages in a sum certain. On January 29, 2018, DBNTC and DBTCA filed an answer to the second amended complaint. On December 7, 2018, DBNTC and DBTCA filed a motion for summary judgment. Also on December 7, 2018, Commerzbank, jointly with thePhoenix Lightplaintiffs, filed a motion for partial summary judgment.

On December 30, 2015, IKB International, S.A. in Liquidation and IKB Deutsche Industriebank A.G. (collectively, “IKB”), as an investor in 37 RMBS trusts, filed a summons with notice in the Supreme Court of the State of New York, New York County, against DBNTC and DBTCA as trustees of the trusts. On May 27, 2016, IKB served its complaint asserting claims for breach of contract, breach of fiduciary duty, breach of duty to avoid conflicts of interest, violation of the Streit Act, violation of the TIA, violation of Regulation AB, and violation of Section 9 of the Uniform Commercial Code. IKB alleges that DBNTC and DBTCA are liable for over U.S. $268 million in damages. On October 5, 2016, DBNTC and DBTCA, together with several other trustees defending lawsuits by IKB, filed a joint motion to dismiss. On January 6, 2017 and June 20, 2017, IKB voluntarily dismissed with prejudice all claims as to seven trusts. As of March 1, 2019, DBNTC and DBTCA’s motion to dismiss has been briefed and is awaiting decision by the court.

It is DBTCA’s belief that it has no pending legal proceedings (including, based on DBTCA’s present evaluation, the litigation disclosed in the foregoing paragraphs) that would materially affect its ability to perform its duties under the related servicing agreement for this transaction.

Item 1119 of Regulation AB

Provided previously in the prospectus of the Registrant relating to the issuing entity and filed on September 29, 2017 pursuant to Rule 424(b)(2) of the Securities Act of 1933, as amended.

Item 1122 of Regulation AB

The reports on assessment of compliance with servicing criteria for asset-backed securities and related attestation reports are attached hereto under Item 15.

The report on assessment of compliance with applicable servicing criteria furnished pursuant to Item 1122 of Regulation AB by AEGON USA Realty Advisors, LLC (“Aegon” or the “Company”), (i) as special servicer for the General Motors Building mortgage loan under the BXP 2017-GM TSA and (ii) as special servicer for the 245 Park Avenue mortgage loan under the 245 Park Avenue Trust 2017-245P TSA, discloses that a material instance of noncompliance occurred, as described below:

The Company has identified an instance of material noncompliance with the following servicing criterion during the Reporting Period of the Platform:

1122(d)(3)(i): Reports to investors, including those to be filed with the Commission, are maintained in accordance with the transaction agreements and applicable Commission requirements. Specifically, such reports (A) are prepared in accordance with timeframes and other terms set forth in the transaction agreements.

For the only active special serviced deal during the reporting period subject to Item 1122(d)(3)(i)(A), the report to the investors was not prepared in accordance with the timeframes and other terms set forth in the transaction agreements for the period of January 1, 2021 to January, 21, 2021.

The identified instance of material noncompliance did not involve the servicing of the assets backing the asset-backed securities covered in this Form 10-K.  Aegon provided the following additional information regarding such material instance of noncompliance:

“The examination performed by PWC, enclosed in this submission, identified an instance of material noncompliance with the servicing criteria set forth in Item 1122(d)(3)(i)(A) of Regulation AB applicable to the Company during year ended December 31, 2021. More specifically, for the only active special serviced deal subject to Item 1122(d)(3)(i)(A), the report to the investors was not prepared in accordance with the timeframes and other terms set forth in the transaction agreements for the period of January 1, 2021 to January 21, 2021. UBSCM 2017-C4 is the specific deal related to the aforementioned finding. No other deals within Aegon’s CMBS special servicing portfolio were related to or impacted by this instance of non-compliance.

Management acknowledges the timeframe for reporting for this active special serviced deal was missed by two days. Despite the timing discrepancy, there was no impact on any investor reporting, issuing, or servicing. No additional testing was available for this particular criteria due to the downsizing of the CMBS portfolio given Aegon’s pending exit from the business line.”

Item 1123 of Regulation AB

The servicer compliance statements are attached hereto under Item 15.

PART IV

Item 15. Exhibits and Financial Statement Schedules.

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: November 27, 2019March 30, 2022

Citigroup Commercial Mortgage Securities Inc.

(Depositor)