I was having problems with my server ( out of memory errors ) , I moved to a new dedicated server with 32 GB Ram and everything is going well but after I moved to the new server I got a new type of errors such " 'Usernames must be unique. The specified username is already in use.' 'Email addresses must be unique. The specified email address is already in use.' 'Please enter a name that is at least 3 characters long.' 'Please enter a valid message.' " these errors are normal errors , but should these errors be in "server" error log ? why this type of errors was not showing on old server error log and now showing up on this server is there a setting I can change to stop logging such type of errors ?