& differences at client level and & differences at plant level

What causes this issue?

You have maintained data for this material differently from the
reference data. This occurs if:
The material is a generic material, and its variants are maintained
differently from the generic material (differences at client level).
Plant data is maintained differently from the reference plant, or if a
reference plant for the variant is maintained differently from the
reference plant for the generic material (differences at plant level).
INCLUDE MH237B OBJECT DOKU ID TX LANGUAGE EN
INCLUDE MH237C OBJECT DOKU ID TX LANGUAGE EN

Error message extract from SAP system. Copyright SAP SE.