Messed Up Key Bindings

[Amped Up 55]

I have made a grave mistake in accidentally changing a key binding in the servers inventory system, so now whenever i left click, it opens/closes the inventory. Making my server experience unplayable. I cannot change the key binding due to the menu closing whenever i click, how can i reset the in-server key bindings?

 

[Amped Up 55]

I Have been helped, and the problem is solved