SAP Message 6B041 - Link & & & & &: Object key assignment not possible

Diagnosis
The link table &V1& contains the entry
VIMI04 &V2& &V3& &V4&
The key &V2& cannot be assigned to a rental agreement or rental unit.

System Response
A new entry with the new business objects for optical archiving inIS-RE cannot be created for this entry.
This optically archived document, therefore, cannot be displayed in theIS-RE master data.