SAP Note 25561 - Allocation: receiver values are written to sender

Symptom:

The allocation in FI-SL by mistake writes receiver values to the sender records.

Cause and prerequisites

The error can actually only occur if the distribution or allocation is made to exactly one receiver value and if this dimension is specified only in the receiver.
Example:

Sender:
Account 400,000
Business area 1000

Receiver:
Business area 1000 - 2000
Cost center 4711

In this case, the sender records would by mistake contain cost center 4711 although this is only specified for the receiver.

Solution
This problem is a conceptual one, which you can only correct by creating yet another dummy segment that contains the same sending and receiving dimensions but no valid master data values (for example, account DUMMY, cost center XXXXXX).
As a result, different source code is generated and the error no longer occurs.
Then you can of course ignore the messages for the dummy segment in the message log.

Additional key words

FI-SL, assessment, distribution