is unused ScreenDefinitionName enumerations free?

The package com.ptc.core.lwc.common.ScreenDefinitionName is define very creen type.

I found a lot of type is not used etc CREATE2 ,CREATE3 and UPDATE2 ,UPDATE3.

I try to create new attriube panel and define some IBA to CREAT2 and CREATE3.

That's different with origianl CREATE.

If I need use it to do something. The system have any issue or not?!

thanks.