Diagnosis
There is a registration entry for &V1& that flags the validityperiod (&V2&) as having an error. The object is assigned to realestate contract &V3& in period &V4&.
This error occurs when the time period was reduced on a higher-levelobject (such as the business entity) of &V1&, and the currentobject adopts this time period. As a result, the time period on thecurrent object was changed implicitly.

Procedure
Correct the time period of the object. When you save, the registrationentry is deleted automatically.