SAP Message WMOD040 - Conflicting posting requests exist for table &1

Diagnosis
The set of return data for automatic maintenance is not unique.

System Response
Database changes cannot be made.

Procedure
INCLUDE ISR_VERWALTUNG OBJECT DOKU ID TX

Procedure for System Administration
The user exit for a automatic maintenance generated a double entry foreither table WMQK, WMQKT, WMQP, or TWMWQ. For example, it may havecreated two records for the same quota scale item (WMQP). Please checkthe logic.