I would try a restack telling ddss to crop to a size that removes the section at the top (and reframe to suit that removal ) them process that image...I think in startools you could remove it using "wipe" ..PI has something similar.
But why I say process without the bad bit is in startools at least that sort of thing can confuse it in effect.
Anyways look at all the good things in the image ..it is a distant gallaxy feel priveled to capture it☺
Alex
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