Unable to delete an IVR with an emergency Group/Flow

[MatejM]

I'm trying to delete some outdated IVR's using the GC CLI. When attempting to delete an IVR with an Emergency Group set, I get an error:

"message": "The resource 57c1cdcc-a273-4641-9765-7ea51234e3ca0 is referenced by the emergencyGroup c72fee61-9232-48f5-22f6-cxb80cf1bdp6.",
"code": "general.conflict",
"status": 409,

Despite the fact that within the UI, this is set on the IVR config, that's not the case via API. So I concluded that I need to modify the emergencyGroup in question and remove the ivr from the array.

The request body would look like this (assume when retriving the emergencyGroup data, ivrs array has 3 items and I've removed one. Also assume the ID's are correct

{
  "emergencyCallFlows": [
    {
      "ivrs": [
        {
          "id": "8ef50190-23c7-455c-8309-f5213ec66ca5",
          "selfUri": "/api/v2/architect/schedulegroups/8ef50190-23c7-455c-8309-f5213ec66ca3",
          "name": "Call Route 1"
        },
        {
          "id": "8ef50191-23c7-455c-8309-f5213ec66ca5",
          "selfUri": "/api/v2/architect/schedulegroups/8ef50191-23c7-455c-8309-f5213ec66ca5",
          "name": "Call Route 2"
        }
      ],
      "emergencyFlow": {
        "id": "5ef50190-23c7-455c-8309-f5213ec66ca4",
        "name": "ER Flow",
        "selfUri": "/api/v2/architect/schedulegroups/5ef5010-23c7-455c-8309-f5213ec66ca4"
      }
    },
    null
  ],
  "name": "EU Emergency",
  "division": {
    "id": "divisonIdHere",
    "name": "MyDivision"
  },
  "description": "Hello World",
  "version": 2,
  "enabled": false
}

Unfortunately, I always get this response:

"message": "The request could not be understood by the server due to malformed syntax.",
"code": "bad.request",
"status": 400

Before I waste any more time with this, is removing an IVR from the emergencyGroup even supported?