Maxscript Help

Hello guys,

Just starting to learn maxscript recently, been wanting to do a very specific thing using maxscript. That is to delete Named Selection Sets in sub-object level, Face.

I tried using

deleteItem selectionSets "my_face_sets"

The code return OK but the selection sets still there?
This line of code seem to work fine with object level but not sub-object level

Not sure if it's a bug or I miss something.

Any pointer guys?