SAP Message AD736 - Foreign key &-& (enter valid cardinality)

Diagnosis
You have entered a semantic foreign key without specifying thecardinality.

Procedure
Enter a cardinality. The following cardinalities are possible:

  • C There may not be more than one dependent record for each record in
    • the check table.
    • 1 Exactly one dependent record exists for each record in the check
      • table.
      • CN Any number of dependent records may exist for each record in
        • the check table.
        • N At least one dependent record must exist for each record in the
          • check table.