STAAD File has syntax error. Please go to the analytical modeling environment for the fixes and come back

I am having yet another annoying problem when trying to export my physical model to my analytical model. Again, it happens in the "Deleting Load Cases" part of the creation. This time, however, it says "STAAD File has syntax error. Please go to the analytical modeling environment for the fixes and come back.".

When I go to the analytical model, it indeed has an error. The problem is that the error is in the automatically generated part, which can only be changed in the physical model. But the physical model can't export to the analytical model because of the error, creating an infinite loop of frustration.

Can anyone help?

Structure - Fourth Version.STDPStructure - Fourth Version.STD