[Common] Adjust PYTHIA autodetect for Pb-Pb (#12080)

Co-authored-by: ALICE Builder <alibuild@users.noreply.github.com>

Author: ddobrigk

Common/TableProducer/multCentTable.cxx

@@ -75,7 +75,7 @@ struct MultCentTable {
     ccdb->setFatalWhenNull(false); // please never crash on your own, all exceptions captured (as they always should)
 
     // task-specific
-    module.init(opts, initContext);
+    module.init(metadataInfo, opts, initContext);
   }
 
   void processRun2(soa::Join<aod::Collisions, aod::Run2MatchedSparse> const& collisions,

Common/Tools/MultModule.h

@@ -413,8 +413,8 @@ class MultModule
   CalibrationInfo nGlobalInfo = CalibrationInfo("NGlobal");
   CalibrationInfo mftInfo = CalibrationInfo("MFT");
 
-  template <typename TConfigurables, typename TInitContext>
-  void init(TConfigurables& opts, TInitContext& context)
+  template <typename TMetadatainfo, typename TConfigurables, typename TInitContext>
+  void init(TMetadatainfo const& metadataInfo, TConfigurables& opts, TInitContext& context)
   {
     // read in configurations from the task where it's used
     internalOpts = opts;
@@ -488,6 +488,11 @@ class MultModule
       listOfRequestors[kPVMults].Append(Form("%s ", "dependency check"));
     }
 
+    // capture the need for PYTHIA calibration in Pb-Pb runs
+    if (metadataInfo.isMC() && mRunNumber >= 544013 && mRunNumber <= 545367) {
+      internalOpts.generatorName.value = "PYTHIA";
+    }
+
     mRunNumber = 0;
     mRunNumberCentrality = 0;
     lCalibLoaded = false;