Issues on deleting wrong credits

From this serie  https://www.imdb.com/title/tt0271894/?ref_=ra_gb_ln?ref_=ra_dc_ln

there are two different  Amy Gardner (I) and (IV) listed in the Additional Crew section - only Amy Gardner (IV) is correct but when going to contribute and delete none of them actually comes up from 'Additional Crew'. What can we do?!