* fix has changes false if deleted result size eq zero https://github.com/seaweedfs/seaweedfs/issues/4171 * fix change respos status 202 to 304 if the file has already been deleted https://github.com/seaweedfs/seaweedfs/issues/4171 * fix delete if set apply changes https://github.com/seaweedfs/seaweedfs/issues/4171 --------- Co-authored-by: Konstantin Lebedev <9497591+kmlebedev@users.noreply.github.co>