Misskey resulted in chown entire directory tree

[John Foster <jfoster@augustmail.com>]

Well this is a first. I do not even know exactly what I did. I do know
that the result is the changing of the owner/group of every file on my
complete directory tree to a single username.groupname. Any Suggestions
are really appreciated. Wierd thing is everything seems to work--some
things even better that before. What to do...
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John Foster                                
jfoster@augustmail.com 
ICQ# 19460173