In my prison server, I have an "Owner" rank and an "O" rank. The plugin deleted the "O" rank once I made the "Owner" rank. When I tried making "O" again, it said rank "O" already exists. Help!

Unfortunately PermissionsEx is currently unmaintained and no further updates are planned. Because of this, all pull requests are being closed. If you are looking for an actively maintained permissions plugin, take a look at LuckPerms. It is compatible with major server platforms and can import data from PEX.