in the compatibility layer, creating a volume with a name that already does not result in an error. instead a 201 response with the existing volume's information is returned. while it seems like a bug on the part of docker and they agree, no attempt has been made to fix it in five years. See https://github.com/moby/moby/issues/16068Fixes: #7740
Signed-off-by: baude <bbaude@redhat.com>