APXINWKB form line level personalization WHEN-VALIDATE-RECORD firing multiple times

Requirement: We have a requirement to add a new DFF context at invoice line level and restrict the user from saving the record if these DFF fields are NULL. Created new context with 2 fields on attribute13 and attribute14 and added form personalization with below condition and error message to enter the required fields

(:LINE_SUM_FOLDER.attribute14 IS NULL or :LINE_SUM_FOLDER.attribute13 IS NULL) AND :INV_SUM_FOLDER.INVOICE_CURRENCY_CODE<>'GBP' AND :LINE_SUM_FOLDER.LINE_TYPE='Tax'

Problem: Error message is firing multiple times (3 times or more)

Expected Behaviour: Validation error message from form personalization to be displayed only once.