$ cd path/to/nextcloud
$ ./occ.sh log:tail # retry an upload in the Android app now, note the path in the error message in "Sabre\DAV\Exception\MethodNotAllowed: The resource you tried to create already exists"
$ rm -r myuser/uploads/001122aabbcc
$ sqlite3 data/owncloud.db "delete from oc_filecache where path like 'uploads/001122aabbcc%';"
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