'name of variable' is the name of a local variable I used but is now deleted since I don't need it anymore.
Maybe because of that "local variable" ? since deleted maybe it cannot be recognize in the group ?
and maybe your "certain condition" still contain that local variable ?
what if make a temporary global varible with exactly same name like the deleted local varible, and after that try to drag the certain condition in to group again.
Just to figure out is it cause by the local variable missing or something else..