Docker: Can't remove macvlan configuration network - docker

Question

Using portainer, I created a macvlan configuration network. Now, I want to remove this network. However, for some reason, I can't. I do receive the following error msg: Error response from daemon: error while removing network: configuration network "my_macvlan_config" is in use.
The weird thing is that I don't think that the network is in use. There is no container attached to it. When inspecting the network, I get the following results:
~$ sudo docker network inspect my_macvlan_config
[
{
"Name": "my_macvlan_config",
"Id": "5d95270684516484632c4505e15ba8253bbe8d780b2c41a84a07fbbe09d7a9b6",
"Created": "2020-05-18T20:59:03.472260896+02:00",
"Scope": "local",
"Driver": "null",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "192.168.13.0/24",
"IPRange": "192.168.13.200/29",
"Gateway": "192.168.13.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": true,
"Containers": {},
"Options": {
"parent": "eth0"
},
"Labels": {}
}
]
Docker itself is running on my Synology Diskstation, fwiw.
EDIT:
There's another network called macvlan that is connected to my_macvlan_config.
~$ sudo docker network inspect macvlan
[
{
"Name": "macvlan",
"Id": "8a831afa776475b01ca240f4b6b2434c820b8a03910b402760e3cd988e7ddb5c",
"Created": "2020-05-23T23:11:17.738229138+02:00",
"Scope": "local",
"Driver": "macvlan",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "192.168.13.0/24",
"IPRange": "192.168.13.210/29",
"Gateway": "192.168.13.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": "macvlan_config"
},
"ConfigOnly": false,
"Containers": {
"6f025749fe99a22fa3729bebfa72d6329b363fe8f6589d9147d0d58a9934dd42": {
"Name": "tvheadend",
"EndpointID": "bc827cb2fddc4374fde7634534efd0c8c110af5a70aa9b16a319b770dfe7a0f2",
"MacAddress": "02:42:c0:a8:0d:d3",
"IPv4Address": "192.168.13.211/24",
"IPv6Address": ""
}
},
"Options": {
"parent": "eth0"
},
"Labels": {}
}
]
And there's one more network, which is apparently unrelated.
~$ sudo docker network inspect macvlan_config
[
{
"Name": "macvlan_config",
"Id": "644a15c6b9e653ec3f48c4a2e290f996b41361170d5ab63053b87a301168345f",
"Created": "2020-05-23T23:10:54.880348491+02:00",
"Scope": "local",
"Driver": "null",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "192.168.13.0/24",
"IPRange": "192.168.13.210/29",
"Gateway": "192.168.13.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": true,
"Containers": {},
"Options": {
"parent": "eth0"
},
"Labels": {}
}
]
I then removed the tvheadend container. I was then able to delete all networks but my_macvlan_config.