Chat Procedures

I am making a forge horror mod for 1.20.1, and I'm not very good at making mcreator Procedures.

I want to make a procedure which sends a message to the action bar of the player, when they complete an advancement. So far, it works, and is set up as:

'Event Trigger- When player completes an Advancement.'

If: Has Event/Target Entity completed advancement: A-Man-Of-God

Do: Send message 'Are you a man of god?' to event/target, show in action bar: True.

Where my issue is, is I would like this to only happen once, not every time they get an advancement and they have this advancement already.

Hopefully someone can help.