PA: Activate Budgetary Control for Projects already created

IN Release 11.5.10.2 we are using Oracle Project Costing for Capital Project Tracking.  The Budgetary Control was disable and last month we decide to activate this function. 

For new projects  this works correctly.  But for previously created projects that has a Budgetary Control Option of Absolute at project and task level, when we enable the Budgetary control we got the following problem in Payables:

1. We create a new project related invoice and match it to an old purchase order (created before budgetary control activation)

2. The check funds result in pass check funds (works correctly)

3. When validate the invoice we get the following hold: