When i and and another player was on the server I've asked him to /warp parkour. He did that but one thing that was weird was that he could destroy blocks. And he could not click the join course sign. But i knew that I've did /region define parkourspawn. So that was really weird. So I've checked and there were 2 regions?! And one region was parkourspawn and the other one was wilderness and I've never seen that region before. So i decided to delete wilderness and that worked. The parkourspawn was now non-griefable. But when the player went back to his survival house (In the main world same as the Parkour) He couldn't destroy block?! But there was no region defined where his house was. So I've decided to make a build allowed region for his house only so he could keep building. i Did /region define buildallowed(Just a name) And i gave that player perm to build only. I don't know whats wrong but if i didn't delete the wilderness region i think the players would be able to grief to whole server.