Weird. “Unstaged changes” is a reference to modified files in your sines folder that git thinks should be committed. Maybe there is a .git folder that maiden doesn’t clear out properly?
ssh into norns, cd to /sines folder, and then run git status - you should see the files that maiden is complaing about. maybe you edited sines.lua? git reset --hard in \sines will wipe out your local changes.
but - maybe you want these changes?