Validation of header level DFF based on receiver Cost center in intercompany

Summary:

We have to add validation to header level DFF based on Distribution → receivers cost center.

Content (please ensure you mask any confidential information)

I’m trying to add a validation in Intercompany transactions where:

• If the user selects X00000 as the Cost Center in the line‑level cost center field,
• And then selects a different Cost Center in the header‑level DFF,
  → the system should throw an error either immediately at the field level or at the time of submission.

I first tried using a Groovy script in Application Composer, but Intercompany does not support Groovy for this object.