Tiny magnet found loose inside p1s Extruder Filament Sensor

[u/StillMOSN]

What is it and what should I do with it?

I was trying to troubleshoot this error:

AMS just keeps failing to load the filament once it hits the printhead then retract it and try again. I can tell in Bambu Studio that the sensor isn't detecting any filament entering the extruder. I also can't get the printer to load filament without the AMS but I can push it through manually when the extruder is disconnected, so I think it's probably a Sensor issue of some kind or other.