diff --git a/MC/config/PWGDQ/external/generator/generator_pythia8_HadronTriggered_withGap.C b/MC/config/PWGDQ/external/generator/generator_pythia8_HadronTriggered_withGap.C
index 8e8f46938..82a547639 100644
--- a/MC/config/PWGDQ/external/generator/generator_pythia8_HadronTriggered_withGap.C
+++ b/MC/config/PWGDQ/external/generator/generator_pythia8_HadronTriggered_withGap.C
@@ -211,4 +211,43 @@ FairGenerator*
   // gen->PrintDebug();
 
   return gen;
-}
\ No newline at end of file
+}
+
+FairGenerator *
+GeneratorInclusiveJpsiPsi2SChiC_EvtGenMidY(int triggerGap, double rapidityMin = -1.5, double rapidityMax = 1.5, bool verbose = false)
+{
+    auto gen = new o2::eventgen::GeneratorEvtGen<o2::eventgen::GeneratorPythia8HadronTriggeredWithGap>();
+    gen->setTriggerGap(triggerGap);
+    gen->setRapidityRange(rapidityMin, rapidityMax);
+    gen->addHadronPDGs(443);
+    gen->addHadronPDGs(100443);
+    gen->addHadronPDGs(445);
+    gen->addHadronPDGs(200443);
+    gen->setVerbose(verbose);
+
+    TString pathO2table = gSystem->ExpandPathName("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGDQ/pythia8/decayer/switchOffJpsi.cfg");
+    gen->readFile(pathO2table.Data());
+    gen->setConfigMBdecays(pathO2table);
+    gen->PrintDebug(true);
+
+    gen->SetSizePdg(4);
+    gen->AddPdg(443, 0);
+    gen->AddPdg(100443, 1);
+    gen->AddPdg(443, 2);
+    gen->AddPdg(100443, 3);
+
+    gen->SetForceDecay(kEvtDiElectron);
+
+    // set random seed
+    gen->readString("Random:setSeed on");
+    uint random_seed;
+    unsigned long long int random_value = 0;
+    ifstream urandom("/dev/urandom", ios::in | ios::binary);
+    urandom.read(reinterpret_cast<char *>(&random_value), sizeof(random_seed));
+    gen->readString(Form("Random:seed = %llu", random_value % 900000001));
+
+    // print debug
+    // gen->PrintDebug();
+
+    return gen;
+}
diff --git a/MC/config/PWGDQ/ini/Generator_InjectedInclusiveJpsiPsi2SMidy_2026_Pythia8_TriggerGap.ini b/MC/config/PWGDQ/ini/Generator_InjectedInclusiveJpsiPsi2SMidy_2026_Pythia8_TriggerGap.ini
index 7ed21efdf..7843272c2 100644
--- a/MC/config/PWGDQ/ini/Generator_InjectedInclusiveJpsiPsi2SMidy_2026_Pythia8_TriggerGap.ini
+++ b/MC/config/PWGDQ/ini/Generator_InjectedInclusiveJpsiPsi2SMidy_2026_Pythia8_TriggerGap.ini
@@ -1,7 +1,7 @@
 ### The external generator derives from GeneratorPythia8.
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGDQ/external/generator/generator_pythia8_HadronTriggered_withGap.C
-funcName=GeneratorInclusiveJpsiPsi2S_EvtGenMidY(5,-1.5,1.5)
+funcName=GeneratorInclusiveJpsiPsi2SChiC_EvtGenMidY(5,-1.5,1.5)
 
 [GeneratorPythia8]
 config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGDQ/pythia8/generator/pythia8_inel_triggerGap.cfg