Credit Adjustment, (Silent and Forgotten) 2018

David

I think the other David has given you a map to the Highway to Hell in a Handbasket!!! LOL
First David you can do your own "Fixes here is how"

From the IMDb Help Center Page (Why do some acting credits show up in a separate list under a category called "Himself" or "Herself" even if those people didn't actually appear as themselves?): 

Most documentaries include appearances of famous people as themselves (i.e. being interviewed or in stock footage), but a few of them also feature reenactments with actors portraying historical characters. Again, these will end up in the "Himself" listing (even though the credit will still list the proper character names). You can prevent this by adding the "reenactment" keyword to such a title.

The title does not have the term reenactment in the Keywords section. If you have an IMDb user account or an IMDbPro account, you can submit the update yourself. 

I hope this helps. Please write back if you have any questions or you need assistance submitting the update. 

IMDb Help Center Page:
Keywords (Look under Special Keywords)