[Common] Change index column identifier (AliceO2Group#11622)

Author: ddobrigk

Common/DataModel/Multiplicity.h

@@ -8,6 +8,11 @@
 // In applying this license CERN does not waive the privileges and immunities
 // granted to it by virtue of its status as an Intergovernmental Organization
 // or submit itself to any jurisdiction.
+
+/// \file Multiplicity.h
+/// \brief multiplicity tables
+/// \author ALICE
+
 #ifndef COMMON_DATAMODEL_MULTIPLICITY_H_
 #define COMMON_DATAMODEL_MULTIPLICITY_H_
 
@@ -184,14 +189,9 @@ DECLARE_SOA_TABLE_VERSIONED(MultMCExtras_001, "AOD", "MULTMCEXTRA", 1, //! Table
                             mult::IsInelGt1<mult::MultMCNParticlesEta10>,
                             o2::soa::Marker<1>);
 
-DECLARE_SOA_TABLE(MultHepMCHIs, "AOD", "MULTHEPMCHI", //! complementary table for heavy-ion mc info (subset of HepMCHeavyIons)
-                  o2::soa::Index<>, hepmcheavyion::McCollisionId, hepmcheavyion::NcollHard, hepmcheavyion::NpartProj, hepmcheavyion::NpartTarg,
-                  hepmcheavyion::Ncoll, hepmcheavyion::ImpactParameter);
-
 using MultMCExtras = MultMCExtras_001;
 using MultMCExtra = MultMCExtras::iterator;
 using MultsExtraMC = MultMCExtras; // for backwards compatibility with previous naming scheme
-using MultHepMCHI = MultHepMCHIs::iterator;
 
 // crosslinks
 namespace mult
@@ -202,6 +202,12 @@ DECLARE_SOA_INDEX_COLUMN(MultMCExtra, multMCExtra);
 DECLARE_SOA_TABLE(Mult2MCExtras, "AOD", "Mult2MCEXTRA", //! Relate reco mult entry to MC extras entry
                   o2::soa::Index<>, mult::MultMCExtraId);
 
+DECLARE_SOA_TABLE(MultHepMCHIs, "AOD", "MULTHEPMCHI", //! complementary table for heavy-ion mc info (subset of HepMCHeavyIons)
+                  o2::soa::Index<>, mult::MultMCExtraId, hepmcheavyion::NcollHard, hepmcheavyion::NpartProj, hepmcheavyion::NpartTarg,
+                  hepmcheavyion::Ncoll, hepmcheavyion::ImpactParameter);
+
+using MultHepMCHI = MultHepMCHIs::iterator;
+
 namespace multZeq
 {
 DECLARE_SOA_COLUMN(MultZeqFV0A, multZeqFV0A, float);           //! Multiplicity equalized for the vertex position with the FV0A detector