The standard GWX 1.2 goes to [G3F I299], what data is in the group?

If I had to guess I'd say it was part of "
Intergrated Orders", I don't know anything about this mod.
Either way there should not be 2 groups the same, though it should cause no effect, the second entry will just overide the first!

Sorry I can't be of much help but don't think it would cause the problem you are getting!