This person was obviously added by mistake. I guess he was credited with the simplified form of 強 as sound recordist in "The Wrongly Accused Lover" (1951), and then looked up by the standard search box which does not find simplified characters (unlike UTF-8 search):
https://hkmdb.com/db/people/view.mhtml? ... ay_set=eng
I already replaced the sound recordist with Kwok Keung.
I already noticed that it's nothing uncommon simplified characters sometimes appear among traditional characters, especially 强/強, 双/雙 and 胆/膽。