I didn’t lookin the database and I would not say this is the best thing to do but you could script something if you have a ton of images that you want to convert…back up everything of course and try on a test subset…but you could edit the database perhaps …I didn’t look there but I think in the xmp version 5 could be changed to version 6…the question is will this not likely change most of your edits enough that you have to retweak filmic anyway??
From an xmp with filmic added…
EDIT : Modversion was the same for v5 and v6 so this won’t help anyway even if you were to do it…this must refer to some other property
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