SAP Message WRF_FOLUPART052 - Material category of original mat. & and follow-up mat. & not identical

System Response The system only creates follow-up/replacement material relationships ifthe orignial material and the follow-up/replacement material have thesame material type. This check is defined in an implementation of BAdI WRF_FOLUP_ACTION_E. Procedure Select an original material and a follow-up/replacement material withthe same material type.