SAP Message BK225 - Inconsistent planning: Price in object curcy 0; in CO area curcy <> 0

Diagnosis
You wish to allocate an activity.

System Response
The prices found by the system in the database are not consistent.

Procedure
Check the planning.
It may be possible that more than one currency was activated for thecontrolling area after the planning was made. If this is the case, youcan copy the planning to a dummy version and then copy this back to thecurrent version.