Cant unlink copied folder from perforce


I have a project where i want to do some changes to a previous version of that project. So i revert to a previous changelist, and then copy the entire project to a completely new folder that is not within the workspace…

However even if i disable the source control, when making changes in this copied project it still ask me to check out the files upon changing them.
But they are not a part of a workspace or anything, so how do i tell unreal that these files should not have anything to do with perforce, and i can change them freely?