diff --git a/PWGEM/Dilepton/Core/DileptonHadronMPC.h b/PWGEM/Dilepton/Core/DileptonHadronMPC.h
index 335b50af12d..5f157ade948 100644
--- a/PWGEM/Dilepton/Core/DileptonHadronMPC.h
+++ b/PWGEM/Dilepton/Core/DileptonHadronMPC.h
@@ -453,8 +453,6 @@ struct DileptonHadronMPC {
 
     used_trackIds.clear();
     used_trackIds.shrink_to_fit();
-    used_refTrackIds.clear();
-    used_refTrackIds.shrink_to_fit();
   }
 
   void addhistograms()
@@ -1063,7 +1061,6 @@ struct DileptonHadronMPC {
   std::map<std::pair<int, int>, uint64_t> map_mixed_eventId_to_globalBC;
 
   std::vector<std::pair<int, int>> used_trackIds;
-  std::vector<std::pair<int, int>> used_refTrackIds;
   int ndf = 0;
 
   template <bool isTriggerAnalysis, typename TCollisions, typename TLeptons, typename TPresilce, typename TCut, typename TAllTracks, typename TRefTracks>
@@ -1142,12 +1139,8 @@ struct DileptonHadronMPC {
 
             // store ref tracks for mixed event in case of kAzimuthalCorrelation
             if (cfgDoMix && cfgAnalysisType == static_cast<int>(o2::aod::pwgem::dilepton::utils::pairutil::DileptonHadronAnalysisType::kAzimuthalCorrelation)) {
-              std::pair<int, int> pair_tmp_refTrack = std::make_pair(ndf, track.globalIndex());
-              if (std::find(used_refTrackIds.begin(), used_refTrackIds.end(), pair_tmp_refTrack) == used_refTrackIds.end()) {
-                used_refTrackIds.emplace_back(pair_tmp_refTrack);
-                emh_ref->AddTrackToEventPool(key_df_collision, EMTrack(ndf, track.globalIndex(), collision.globalIndex(), track.trackId(), track.pt(), track.eta(), track.phi(), 0.139));
-              } // store ref tracks
-            }
+              emh_ref->AddTrackToEventPool(key_df_collision, EMTrack(ndf, track.globalIndex(), collision.globalIndex(), track.trackId(), track.pt(), track.eta(), track.phi(), 0.139));
+            } // store ref tracks
           }
         }
         for (const auto& [ref1, ref2] : combinations(CombinationsStrictlyUpperIndexPolicy(refTracks_per_coll, refTracks_per_coll))) {
diff --git a/PWGEM/PhotonMeson/Core/DiphotonHadronMPC.h b/PWGEM/PhotonMeson/Core/DiphotonHadronMPC.h
index b8a61b258d7..01619ba089c 100644
--- a/PWGEM/PhotonMeson/Core/DiphotonHadronMPC.h
+++ b/PWGEM/PhotonMeson/Core/DiphotonHadronMPC.h
@@ -325,8 +325,6 @@ struct DiphotonHadronMPC {
     used_photonIds.shrink_to_fit();
     used_dileptonIds.clear();
     used_dileptonIds.shrink_to_fit();
-    used_refTrackIds.clear();
-    used_refTrackIds.shrink_to_fit();
 
     map_mixed_eventId_to_globalBC.clear();
   }
@@ -486,7 +484,6 @@ struct DiphotonHadronMPC {
 
   std::vector<std::pair<int, int>> used_photonIds;              // <ndf, trackId>
   std::vector<std::tuple<int, int, int, int>> used_dileptonIds; // <ndf, trackId>
-  std::vector<std::pair<int, int>> used_refTrackIds;            // <ndf, trackId>
   std::vector<std::tuple<int, int, int, int>> used_diphotonIds; // <ndf, trackId>
   std::map<std::pair<int, int>, uint64_t> map_mixed_eventId_to_globalBC;
 
@@ -708,12 +705,7 @@ struct DiphotonHadronMPC {
           if (fEMTrackCut.IsSelected(track)) {
             fRegistry.fill(HIST("Hadron/hs"), track.pt(), track.eta(), track.phi());
             fRegistry.fill(HIST("Hadron/hTrackBit"), track.trackBit());
-
-            std::pair<int, int> pair_tmp_ref = std::make_pair(ndf, track.globalIndex());
-            if (std::find(used_refTrackIds.begin(), used_refTrackIds.end(), pair_tmp_ref) == used_refTrackIds.end()) { // add a ref track in mixing pool
-              emh_ref->AddTrackToEventPool(key_df_collision, EMTrack(ndf, track.globalIndex(), collision.globalIndex(), track.globalIndex(), track.pt(), track.eta(), track.phi(), 0.139));
-              used_refTrackIds.emplace_back(pair_tmp_ref);
-            }
+            emh_ref->AddTrackToEventPool(key_df_collision, EMTrack(ndf, track.globalIndex(), collision.globalIndex(), track.globalIndex(), track.pt(), track.eta(), track.phi(), 0.139));
           }
         }