Guys i need help i have my server and it has a plotme world for creative and a survival world for survival. I blocked enderchests but my issue is when they switch worlds all their stuff comes with them. *How do i set it so when they leave the creative world they loose everything but when the go back to the creative world they get it all back*

I have seen this before on other servers and i have searched google to find nothing PLEASE help i cant invsee fast enough with my staff.