Redirect loop with similar URLs

RedirectMatch is very helpful if you want to redirect according to regular expression or similar. This is not needed here, and could be the very reason of your problem. Try the following instead

Redirect 301    /fall    /fall-2019

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)