Every so often I am finding that files that were in my file manager disappear. I log on to the server and see that the file is there locally, but the file manager no longer has them. I go on to the database and go to the files table and look up that portal and there are no longer any files there. I hit synchronize and the files reappear, but with different id's in the table which is causing issues with some modules I use. What would cause DNN to delete files that haven't moved? This is my second DNN server and the first one had the same issue.