rdisp/convert_old_epp_recs is a SAP Parameter attribute which is used to control Should we convert old passport records information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
This parameter determines if passport records (EPP stands for Extended
Passport) that were received with an older version have to be converted
to the current version. This makes sense in order to be able to make use
of the options of the new passport.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.