PVC flange too high, concrete slab
I discovered the toilet flange in our downstairs bath is about 3/16-1/4” above the concrete slab. Maybe this clearance was left for subfloor/tile that never got installed. Anyway, the toilet rests on the flange unless a lot of shims are used. Also, it looks like the previous owner must have over-tightened the bolts (flange is slightly warped), probably an attempt to stop the toilet from rocking. The flange and pipe are PVC, and I think the flange is glued in. Can the flange be removed easily, and what would I need to do to install a new one at the proper height?
Thanks