Dupe glitch in a case clicker game

Hey all basically there’s a glitch in the game where a user sells a item in the marketplace for a negative amount and when someone buys that they end up with QN’s of cash

Is there any way to fix this?

Make it so it doesnt let you sell an item that is a negative amount

If you dont send us script we can do nothing about it.

You can check if the amount in Market Place is positive number idk anything else without seeing the code.