Spam error: Calling hook CanCombineDroppedItem resulted in a conflict

I have this error spam in my console.

Calling hook CanCombineDroppedItem resulted in a conflict between the following plugins: BankSystem - False (Boolean), Loottable (True (Boolean))

I think it has to do with the currency item I've implemented using the BankSystem plugin, but I don't quite understand why it's showing the error. The item stacks properly right now.

Loottable has a built-in stack size controller and other plugins should ignore stacking related hooks when Loottable is installed. You have to ask the developer of the BankSystem plugin to implement that. The other option is to disable the stack size controller of Loottable if you don't use it.