I am following this doc and everything goes swimmingly verifying the overlay network, seeing each agent in the swarm get it created. But when I try to run the nginx image, I get this message:

root@hobo:~# docker run -itd --name=web --net=my-net --env="constraint:node==hobo" nginx
ed181ec9bd9422284451ef4106ffc272c31747a8fd187566a3ab6d768cc7fc02
Error response from daemon: Cannot start container ed181ec9bd9422284451ef4106ffc272c31747a8fd187566a3ab6d768cc7fc02: subnet sandbox join failed for "10.0.0.0/24": error creating vxlan interface: file exists

I'm not sure how to act on that. I've tried different nodes, and I've tried putting the "-H tcp://<manager_ip>:2376" in the docker command to send it to the swarm "host", with no impact, same behavior.