Diagnosis
You want to change the control for negative acquisition value.

System Response
This change is possible. It will effect all the assets you create inthis class in the future.
Assets already defined will not be effected by this change. If you wantthem to be, you will have to perform a mass change for all the assets.
Instead of changing the control indicator for negative acquisition andproduction costs, you should think about creating a new asset class.

Procedure
Instead of changing the control indicator for negative APC, youshould consider creating a new asset class.