Diagnosis
A structure should be created for the change document object whichcorresponds to the key of a business object type.
There is already a structure for the change document object that makesthe change document object compatible with a business object type.

Procedure
Only overwrite the existing structure if the link between the changedocument object and the other business object type is no longer needed.
If the existing link remains, you must allocate the event a differentbusiness object type. This business object type must have a keystructure identical to the change object type or a key structureidentical to the structure defined.