SAP Message 5O513 - There are multiple entries in T512N for rule &

Diagnosis
In the parameter Pay slip form, you have entered aform ID for which several of the same rules (field T512N-rule)exist intable T512N. The rules for the pay slip form require a clearassignment of the form fields to the data carrier fields. This meansthat the rule in table T512Q (Information on Fixed Positions)can be assigned more than once. However, in table T512N it canonly be assigned to a single field of the data carrier.

Procedure for System Administration
For your pay slip form, adjust the table entries for T512N inyour productive client to the table entries in table T512N inthe standard client that are stored for the form AZ97.