Conflict with invisible container blocks docker-compose up [resolved]

I installed docker for mac yesterday and a migration happened with 3 containers, one being ideas_db_1. The problem is that docker complains that this container is there and there is a conflict. But I don’t see this container and cannot remove it.

See commands I ran. It’s with 1.11 beta 7.

MacBook-Pro-de-Ludovic:Ideas Ludo$ docker-compose up
Creating ideas_db_1

ERROR: for db Conflict. The name “/ideas_db_1” is already in use by container 0899e422ea2b947c09129f81eb52c75ada42d3a82475a55332c0f3f8850b7c6e. You have to remove (or rename) that container to be able to reuse that name.
Attaching to
MacBook-Pro-de-Ludovic:Ideas Ludo$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
MacBook-Pro-de-Ludovic:Ideas Ludo$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ideas_idea_service latest aad924de4681 About an hour ago 975.2 MB
44a21d8725aa 13 hours ago 644.2 MB
node latest 1de2e178998e 9 days ago 644.2 MB
couchbase community-4.0.0 11f3870eeed3 4 weeks ago 156.8 kB
nginx 1.9.12 d92d5fcb0e57 5 weeks ago 0 B
MacBook-Pro-de-Ludovic:Ideas Ludo$ docker -v
Docker version 1.11.0, build 4dc5990

thx
Ludovic

do you have a solution ?