SAP Message PX080 - User &2 is already assigned in client &1

Diagnosis
In client &V1&, the personnel number &V4& is already assigned to theuser &V2& on the date of the conversion in the Communication(0105) infotype. Since a user can only ever be assigned one personnelnumber, assignment to personnel number &V3& is not permitted accordingto view Assign User - Personnel number (V_T513A) .

System Response
The corresponding table entry is not converted.

Procedure
If necessary, correct the assignment in the Communicationinfotype (0105).