The player in the first SS is outside the PVP zone.
The player in the second SS walks into the PVP zone with the sign tool equipped and has walked out.
When a player enters the PVP zone, the zone removes all of their tools and gives them a sword.
The Problem
The tools are correctly taken away inside the zone; however, the GUI attached to the tool stays on the screen even after the player leaves the zone and gets their tools back.
If the player enters the zone with the tool multiple times, the GUI duplicates and keeps stacking, which causes a problem.
All the work (giving and removing tools) is done in one script.
How can I fix the GUI issue?

