I used world edit to move an ocean monument closer to my base by the ocean and I moved the entire thing as well and change the biome to "deep ocean" but the guardians won't spawn. Any solutions to that? thanks!
It's not the structure itself that allows guardians to spawn, it's the position it was generated that is stored somewhere.
I haven't got a clue where or whether it could be edited I'm afraid.
I hope somebody else has the answer.