SAP Message AJ172 - Operand &1 is not used as a deletion operand

Diagnosis
You use operand &v1& as the input operand of a deletion variant inschema step &v2&. However, the operand is not used as adeletion operand in any other schema step. This isnot permitted.

System Response
The schema is not consistent and cannot be saved.

Procedure
Maintain the deletion operand in the schema.