SAP Message 63408 - Real estate object(s) is(are) already assigned to agreement & &

Diagnosis
The real estate object you have entered is already assigned tomanagement contract &V1& &V2&.

System Response
The system accepts your entry. However, in a settlement of themanagement contracts, services that were only performed once may becalculated several times.

Procedure
Verify your entry and correct it, if necessary.