diff --git a/modules/adagioAnalyticsAdapter.js b/modules/adagioAnalyticsAdapter.js
index bb5de41d3ce..abdcc30ee31 100644
--- a/modules/adagioAnalyticsAdapter.js
+++ b/modules/adagioAnalyticsAdapter.js
@@ -36,15 +36,6 @@ const cache = {
       ...values
     };
   },
-
-  // Map prebid auction id to adagio auction id
-  auctionIdReferences: {},
-  addPrebidAuctionIdRef(auctionId, adagioAuctionId) {
-    this.auctionIdReferences[auctionId] = adagioAuctionId;
-  },
-  getAdagioAuctionId(auctionId) {
-    return this.auctionIdReferences[auctionId];
-  }
 };
 const enc = window.encodeURIComponent;
 
@@ -250,9 +241,6 @@ function handlerAuctionInit(event) {
     // We assume that all Adagio bids for a same adunit have the same params.
     const params = adagioAdUnitBids[0].params;
 
-    const adagioAuctionId = params.adagioAuctionId;
-    cache.addPrebidAuctionIdRef(prebidAuctionId, adagioAuctionId);
-
     // Get all media types requested for Adagio.
     const adagioMediaTypes = removeDuplicates(
       adagioAdUnitBids.map(bid => Object.keys(bid.mediaTypes)).flat(),
@@ -265,7 +253,7 @@ function handlerAuctionInit(event) {
       org_id: params.organizationId,
       site: params.site,
       pv_id: params.pageviewId,
-      auct_id: adagioAuctionId,
+      auct_id: prebidAuctionId,
       adu_code: adUnitCode,
       url_dmn: w.location.hostname,
       pgtyp: params.pagetype,
@@ -342,9 +330,8 @@ function handlerBidWon(event) {
 
   const adagioAuctionCacheId = (
     (event.latestTargetedAuctionId && event.latestTargetedAuctionId !== event.auctionId)
-      ? cache.getAdagioAuctionId(event.auctionId)
+      ? event.auctionId
       : null);
-
   cache.updateAuction(auctionId, event.adUnitCode, {
     win_bdr: event.bidder,
     win_mt: getMediaTypeAlias(event.mediaType),
diff --git a/test/spec/modules/adagioAnalyticsAdapter_spec.js b/test/spec/modules/adagioAnalyticsAdapter_spec.js
index 663da9c4fb8..50e3c944029 100644
--- a/test/spec/modules/adagioAnalyticsAdapter_spec.js
+++ b/test/spec/modules/adagioAnalyticsAdapter_spec.js
@@ -178,9 +178,7 @@ describe('adagio analytics adapter - adagio.js', () => {
 });
 
 const AUCTION_ID = '25c6d7f5-699a-4bfc-87c9-996f915341fa';
-const AUCTION_ID_ADAGIO = '6fc53663-bde5-427b-ab63-baa9ed296f47'
 const AUCTION_ID_CACHE = 'b43d24a0-13d4-406d-8176-3181402bafc4';
-const AUCTION_ID_CACHE_ADAGIO = 'a9cae98f-efb5-477e-9259-27350044f8db';
 
 const BID_ADAGIO = {
   bidder: 'adagio',
@@ -395,8 +393,7 @@ const AUCTION_INIT_ANOTHER = {
     'bids': [ {
       'bidder': 'adagio',
       'params': {
-        ...PARAMS_ADG,
-        adagioAuctionId: AUCTION_ID_ADAGIO
+        ...PARAMS_ADG
       },
       'mediaTypes': {
         'banner': {
@@ -532,8 +529,7 @@ const AUCTION_INIT_CACHE = {
     'bids': [ {
       'bidder': 'adagio',
       'params': {
-        ...PARAMS_ADG,
-        adagioAuctionId: AUCTION_ID_CACHE_ADAGIO
+        ...PARAMS_ADG
       },
       'mediaTypes': {
         'banner': {
@@ -676,7 +672,7 @@ describe('adagio analytics adapter', () => {
         expect(pathname).to.equal('/pba.gif');
         expect(search.v).to.equal('1');
         expect(search.pbjsv).to.equal('$prebid.version$');
-        expect(search.auct_id).to.equal(AUCTION_ID_ADAGIO);
+        expect(search.auct_id).to.equal(AUCTION_ID);
         expect(search.adu_code).to.equal('/19968336/header-bid-tag-1');
         expect(search.org_id).to.equal('1001');
         expect(search.site).to.equal('test-com');
@@ -708,7 +704,7 @@ describe('adagio analytics adapter', () => {
         expect(hostname).to.equal('c.4dex.io');
         expect(pathname).to.equal('/pba.gif');
         expect(search.v).to.equal('3');
-        expect(search.auct_id).to.equal(AUCTION_ID_ADAGIO);
+        expect(search.auct_id).to.equal(AUCTION_ID);
         expect(search.adu_code).to.equal('/19968336/header-bid-tag-1');
         expect(search.win_bdr).to.equal('another');
         expect(search.win_mt).to.equal('ban');
@@ -749,7 +745,7 @@ describe('adagio analytics adapter', () => {
         expect(pathname).to.equal('/pba.gif');
         expect(search.v).to.equal('1');
         expect(search.pbjsv).to.equal('$prebid.version$');
-        expect(search.auct_id).to.equal(AUCTION_ID_CACHE_ADAGIO);
+        expect(search.auct_id).to.equal(AUCTION_ID_CACHE);
         expect(search.adu_code).to.equal('/19968336/header-bid-tag-1');
         expect(search.org_id).to.equal('1001');
         expect(search.site).to.equal('test-com');
@@ -772,7 +768,7 @@ describe('adagio analytics adapter', () => {
         expect(pathname).to.equal('/pba.gif');
         expect(search.v).to.equal('1');
         expect(search.pbjsv).to.equal('$prebid.version$');
-        expect(search.auct_id).to.equal(AUCTION_ID_ADAGIO);
+        expect(search.auct_id).to.equal(AUCTION_ID);
         expect(search.adu_code).to.equal('/19968336/header-bid-tag-1');
         expect(search.org_id).to.equal('1001');
         expect(search.site).to.equal('test-com');
@@ -804,8 +800,8 @@ describe('adagio analytics adapter', () => {
         expect(hostname).to.equal('c.4dex.io');
         expect(pathname).to.equal('/pba.gif');
         expect(search.v).to.equal('3');
-        expect(search.auct_id).to.equal(AUCTION_ID_ADAGIO);
-        expect(search.auct_id_c).to.equal(AUCTION_ID_CACHE_ADAGIO);
+        expect(search.auct_id).to.equal(AUCTION_ID);
+        expect(search.auct_id_c).to.equal(AUCTION_ID_CACHE);
         expect(search.adu_code).to.equal('/19968336/header-bid-tag-1');
         expect(search.win_bdr).to.equal('adagio');
         expect(search.win_mt).to.equal('ban');
@@ -821,8 +817,8 @@ describe('adagio analytics adapter', () => {
         expect(hostname).to.equal('c.4dex.io');
         expect(pathname).to.equal('/pba.gif');
         expect(search.v).to.equal('4');
-        expect(search.auct_id).to.equal(AUCTION_ID_ADAGIO);
-        expect(search.auct_id_c).to.equal(AUCTION_ID_CACHE_ADAGIO);
+        expect(search.auct_id).to.equal(AUCTION_ID);
+        expect(search.auct_id_c).to.equal(AUCTION_ID_CACHE);
         expect(search.adu_code).to.equal('/19968336/header-bid-tag-1');
         expect(search.rndr).to.equal('0');
       }