Ghost left behind after using Remove

[diiwanderlust]

I have this issue but without having any other maskes applied to the photo. In fact I completely reset the edit, to make sure of it, but the outline still remains. Has anyone come accross this? 

[Branched off from another thread by moderator, because it is not the same issue as that thread]

[JohanElzenga]

You need to explain which remove tool you used and with what settings (feathering, opacity).

[johnrellis]

Many have observed here that the replacements made by Generative Remove sometimes don't match the photo's tone. To get better matches, these techniques sometimes help:

1. Adobe recommends applying Denoise before Remove. This can reduce the noise, making it more likely the replacement will match.

2. Try making a larger selection, even including the entire background. 

3. Sometimes there's a distinctly visible boundary where the tone or noise don't match. You can often use the heal tool around the boundary to get better feathering and make it less noticeable -- apply Heal in small brush strokes. Or use a Brush mask with maximum feathering, dropping local Texture, Clarity, and Sharpness to their minimum values. Sometimes, making a very raggedy selection around the object makes the boundary less noticeable.