Any localscript trying to edit one of those values will only show the changes on that player’s screen, not for the server, so the player(client) could have 100 GBP on their screen, but the server wouldn’t see any changes, and when they leave, the server saves that unchanged value, you might want to look into https://www.robloxdev.com/articles/Remote-Functions-and-Events and https://www.robloxdev.com/articles/Roblox-Client-Server-Model to see how to make your localscripts FE compatible
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