Procedure Player completes Advancement executes multiple times

Hi im making a mod where you get an Item when you complete any Advancement.

The Problem is taht i complete 1 advancement and i sometimes get 8 items sometimes 5 or 7 but i only want it to give the player 1

my code: https://imgur.com/a/PVspApy

video: https://imgur.com/a/z5FzkVi

hope someone can help