How to remove a "casual" I added to someone else's observation

[bkatzenberg]

In doing IDs I saw an observation of a plant that I thought was probably planted in a garden. So I ticked the “casual” box but explained why in the comments. The person said they thought it was not a planted specimen so now I want to fix it. I couldn’t see how to modify that criterion post–facto I actually deleted my own confirmation of the species which may have made things worse

[bouteloua]

On the observation page, at the bottom under Data Quality Assessment, click the “thumbs down” again to remove it: