How to make a mapping between legal entity and Assignment DFF ?

Summary:

In order to increase the quality of the data sent to the payroll system, we need to implement a control between the Convention collective (DFF) and the Legal entity

Content (please ensure you mask any confidential information):

Hello ,

The following use case has been expressed by our customer:

Create a mapping between two fields :
Legal entity and a DFF (PER_ASG).
The purpose is to validate only certain values depending on the legal entity chosen.

The case has been approved by Oracle.

Here's the rule set up, but it doesn't work and generates errors.

Could you please help me?