WordPress automatically adding extra -1 or slug postfix while updating a sub category item

Slugs are unique. You probably have a tag with slug “water-lab” so wordpress renames your Sub category. Please double check that there is not article, tag etc with the same slug

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