how do i fix this

[RubberGazelle]

ModError: Unresolved name conflicts for mods "worldedit_commands", "worldedit", "worldedit_gui", "worldedit_shortcommands", "datastorage", "basic_materials".
Check debug.txt for details.

[Nathan.S]

You probably have two copies of one of those mods, or there is a dependency issue.
debug.txt might give you a little more information as to what the exact problem is, but I'm not sure.

I'd try enabling them one at a time and see which one gives the error, and then go from there.