mm channel, zptmassreiweighting

[harrypuuter]

bug appears in ntuple production, with debug=true it states

Warning in TStreamerInfo::BuildCheck:
The StreamerInfo of class RooBinningCategory read from file data/zpt/htt_scalefactors_legacy_2018.root
has the same version (=1) as the active class but a different checksum.
You should update the version to ClassDef(RooBinningCategory,2).
Do not try to write objects with the current class definition,
the files will not be readable.

Warning in TStreamerInfo::CompareContent: The following data member of
the on-file layout version 1 of class 'RooBinningCategory' differs from
the in-memory layout version 1:
RooTemplateProxy _inputVar; //
vs
RooTemplateProxy _inputVar; //
Error in TClass::RegisterStreamerInfo: Register StreamerInfo for RooBinningCategory on non-empty slot (1).

(migrated from KIT-CMS/CROWN#151)