Condition record not adopted due to discrepancy in validity period

What causes this issue?

A condition record of rebate arrangement &V1& has a validity period
that differs from that of the rebate arrangement (&V3& - &V4&).
Since the rebate arrangement is not subject to periodic settlement
accounting (no settlement calendar) no appropriate new validity period
can be determined.

System Response

The condition record was not adopted in the extended rebate arrangement
in the process of periodic extension.

How to fix this error?

Please check rebate arrangement &V2&. It may be necessary to enter the
condition with the key combination &V1& manually.

Error message extract from SAP system. Copyright SAP SE.