Ports already allocated

Hi,

I had a lazylibrarian container setup through portainer and was working well. I installed another version (thraxis) and stupidly forgot to allocate different ports. When I installed the conflicting version both containers (old and thraxis) disappeared from the container list, and I can’t find them anywhere.

I assumed that I’d broken it and have attempted a reinstall. I reinstalled the original version via linux and the container appears in portainer (hooray!), however during the deployment I get the following error in linux:

fatal: [127.0.0.1]: FAILED! => {"changed": false, "msg": "Error starting container b9f6002c736d4fdb1f0e85506a4c1c1eeb4a43d99f5aa8c7fd1f78d321dde2fa: 500 Server Error: Internal Server Error (\"driver failed programming external connectivity on endpoint lazylibrarian (db9e364069382ec348f5ddfaef25f71dc3afe4e33aeb5357f7ef0fd96a39ee49): Bind for 127.0.0.1:5299 failed: port is already allocated\")"}
    to retry, use: --limit @/opt/communityapps/apps/lazylibrarian.retry

I can see from the error message that the port is already allocated (I assume to the previously existing containers). How do I free the port up? Also, is there another section within portainer where I might find the two broken/conflicting containers so that I can remove them?

Massive thanks in advance to anyone who’s able to help, I’m totally stuck!
Timmeh!