WorldEdit version: 7.3.0-SNAPSHOT+5491
WorldGuard version: 7.0.5-SNAPSHOT+2085
Platform version: PaperMC-344

I use permission:
worldguard.region.redefine.own.*

The /rg redefine command does not check if there are foreign regions in the selection. I assume this is a bug and the "/ rg redefine" command should check the selection as a '/rg claim or /rg define" command. The command can be used to rob players.

define and redefine aren't held to the same limits as claim. there is no "reclaim" command and there is unlikely to be. the claim system is intentionally left rudimentary.