SAP Note 26589 - KI249 in preliminary posting

Symptom:

If documents are posted in preliminary posting, the system issues a message informing you that double-account assignments are not allowed (KI249).

Cause and prerequisites

A default account assignment (for example, a cost center) is defined for the cost element. In preliminary entry, the user cancels the default account assignment (cost center = blank) and specifies a project account assignment. During posting, the cost center is again proposed through the default account assignment and at the same time the project account assignment is transferred.

Solution
You can use the following repair to prevent default account assignments being proposed again during posting (FBV0). However you must comply strictly with the following:

This repair may only be made if fields are not hidden (for example, profit center) and if these fields are to be supplied through the posting transaction by means of the default account assignments. Otherwise these fields would contain no data in the accounting document.

Additional key words

FBV0, preliminary posting, default account assignments, OKB9