I just merged these recordings: https://beta.musicbrainz.org/recording/babb7beb-e1dc-416b-be09-f101b4f4d220
Some of the credits conflicted. You can see my research in the annotation. The date discrepancy was pretty clearly a matter of typos. I’m just trying to decide if should leave both pianist credits or only the one that seems most likely based on the documentation I’ve found. There is support for both, but I suspect that any releases crediting Longshaw as the pianist get their information from the same source. This book provides much more detail and context in favor of Henderson’s presence (and Armstrong and Green were in Henderson’s band): https://books.google.com/books?id=dGUyDwAAQBAJ&pg=PA68&lpg=PA68#v=onepage&q&f=false
Edit: Found another source for Henderson. I went ahead with removing Longshaw, and left the explanation.