How do I stop my class d from becoming a blob?

So, im trying to make it so that when the class-d in my game finds a keycard, the card pins to them, and it's placed in their inventory. However, the class-d's keep on running into each other trying to get the card, and it eventually becomes a single blob of class-ds snatching cards. how do i prevent this?

Prevent it in what sense because your events say to constantly pathfind to it

I want the class-d to continue searching for level 1 keycard until they have it, or another class d has it. There are many things that still need to be implemented, which is why it looks like that. I attempted to do this:

but it didn't work out and it just disabled class d movement. Dude, I'm a beginner. I just need some help

Ok so when one collides with the keycard, set a global variable to 1. Then under the 'find path to keycard' event add a condition on the left 'global variable=0' this means they will only pathfind to it if no one has it.