I get this from time to time:
Error response from daemon: Conflict. The container name "/0_2696931754984343768_clone" is already in use by container "75f74597934a142e8559104dba9bc0770e39e771e58ab25304fdea1202e6dc3d". You have to remove (or rename) that container to be able to reuse that name.
Any idea what it could be? Anyone seen this before?