Edge Rushers are the worst value contracts in the league. Tag Shaq again.

https://www.spotrac.com/nfl/rankings/cap-hit/edge/

This list is riddled with injuries and low production. Even Mack hasn't produced enough for what the Bears gave up and are paying him. Dante Fowler 11 sacks in his 2019 contract year, gets insane contract from Falcons and spits out 3 sacks in a year where they were giving up huge leads what seemed like every week. Miller, Jones and Ford missed the entire season. Edge Rushers are the new running backs except you need them to win but you can't pay them as they age. Even Watt missed 24 games in consecutive seasons at 27 and 28.

Tagging Shaq again would still keep him below his market value and you protect yourself from him being one of the disasters on this list next year.