“This message was added in version X” showing a later version than current one

Well, this is some hasty copy/paste mistake in WP code while backporting features/bugfixes to older versions. Checked 4.3.22 code – it indeed contains version number 4.8.3 attached to this error message.

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