Master Recipe Selection Error!

Hi experts,

Please help me to solve this case:

I have a planned order and want to convert it into process order, this message appears:

No task list within validity period of production version

Message no. CP006

Diagnosis

During routing selection, the system searches for production version . A routing exists for this production version, however, it is not valid for the validity period of the production version.

I checked and found that the validity period of master recipe & production version are the same.

Using COR1, I can create process order with appropriate Master Recipe!

All settings for master recipe selection in COR4 are correct.

What seem to be the problem here?