When you add bands and chains into the mix, you basically create new movements. The new movements require their own PR designations.
Examples:
Flat Bench Press (Comp.) - straight weight
Flat Bench Press (1 chain, 2 chains, 3 chains, etc...)
Flat Bench Press (bands & band combos - choked, doubled)
You may have 50+ flat bench variations that each require their own PR. Apples to apples whenever possible for consistant strength gain tracking.