SAP Message REMICL138 - Contract &1: Partner &2 being used outside of assignment period

Diagnosis
Partner &V1& is assigned to contract &V2& for a limited time. However,the partner is assigned to condition &V3& outside of this time period.

System Response
The system cannot convert contract &V2&.

Procedure
Change the time period in which the partner is assigned to the contract,or adjust the validity of the condition to agree with this time period.