When running the deploy.sh script docker stack deploy -c ... fails with:

networks.traefik-public Additional property name is not allowed

The following gets added to the docker-stack.yml by docker-compose -f docker-compose.yml config > docker-stack.yml

networks: traefik-public: external: true name: traefik-public

This goes for docker-compose file version 3.3 and 3.6.

If I remove the name: traefik-public line everything works fine. I am not that experienced with docker networks but why is config adding a property that docker stack deploy does not allow?

Ubuntu 20.04
Docker version 20.10.2, build 2291f61
docker-compose version 1.27.4, build 40524192
docker-py version: 4.3.1
CPython version: 3.7.7
OpenSSL version: OpenSSL 1.1.0l 10 Sep 2019