SAP Message 62672 - No field key for object. Function cannot be carried out

Diagnosis
No field key has been assigned to object &v1& in Customizing.

System Response
The system does not execute the function 'User field'.

Procedure
If you require user-defined fields for the object, contact your systemadministrator.

Procedure for the system administrator
Assign at least one field key to object &v1& in Customizing.