Validity Check Not Work

Hello guys, I’m trying to use the Validity Checks from the dictionary, and it doesn’t validate anything, let me insert it anyway, I’m using the template to validate, any ideas?
C9.1, ABC with PostgreSQL

Have you considered first putting the check in PostgreSQL? That MIGHT be enough, but sometimes it is helpful to the user to have a check before the insert/update is sent to the server. However, PostgreSQL should have the final word.

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Yes, but I would like you to give that red visual feedback to the customer.

SOLVED! Need to mark as REQUIRED in the Properties!