problems with enabling sv_cheats

hey, so i am in multiplayer with no mod on and i am going into a private match to enable cheats so that i can use noclip to explore outside of the map but when i go to console and type "/sv_cheats 1" it does not tell me something like unable to allow cheats or the usual message that it says in the chat when you enable cheats in a steam game. so i enter the command again and it didn't even enable cheats. is there a thing with t5m that does not allow to enable cheats or something?