Error from azurerm_network_interface_backend_address_pool_association: CannotMixIPBasedAddressesAndIPConfigurationsOnLoadBalancerBackendAddressPool

error.log

2024-05-14T21:05:13.346+1000 [DEBUG] provider.terraform-provider-azurerm_v3.103.1_x5: Determining which Resource Providers require Registration: timestamp="2024-05-14T21:05:13.345+1000"
2024-05-14T21:05:13.346+1000 [DEBUG] provider.terraform-provider-azurerm_v3.103.1_x5: All required Resource Providers are registered: timestamp="2024-05-14T21:05:13.345+1000"
azurerm_network_interface_backend_address_pool_association.my_nic_address_pool: Creating...
2024-05-14T21:05:13.347+1000 [INFO]  Starting apply for azurerm_network_interface_backend_address_pool_association.my_nic_address_pool
2024-05-14T21:05:13.348+1000 [DEBUG] azurerm_network_interface_backend_address_pool_association.my_nic_address_pool: applying the planned Create change
2024-05-14T21:05:13.348+1000 [INFO]  provider.terraform-provider-azurerm_v3.103.1_x5: preparing arguments for Network Interface <-> Load Balancer Backend Address Pool Association creation.: timestamp="2024-05-14T21:05:13.348+1000"
2024-05-14T21:05:13.348+1000 [DEBUG] provider.terraform-provider-azurerm_v3.103.1_x5: Locking "azurerm_network_interface.nic-1": timestamp="2024-05-14T21:05:13.348+1000"
2024-05-14T21:05:13.348+1000 [DEBUG] provider.terraform-provider-azurerm_v3.103.1_x5: Locked "azurerm_network_interface.nic-1": timestamp="2024-05-14T21:05:13.348+1000"
2024-05-14T21:05:13.348+1000 [DEBUG] provider.terraform-provider-azurerm_v3.103.1_x5: AzureRM Request: 
GET /subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/networkInterfaces/nic-1?api-version=2022-07-01 HTTP/1.1
Host: management.azure.com
User-Agent: Go/go1.21.6 (amd64-linux) go-autorest/v14.2.1 tombuildsstuff/kermit/v0.20240122.1123108 network/2022-07-01 HashiCorp Terraform/1.8.3 (+https://www.terraform.io) Terraform Plugin SDK/2.10.1 terraform-provider-azurerm/3.103.1 pid-222c6c49-1b0a-5959-a213-6608f9eb8820
X-Ms-Correlation-Request-Id: 3380370e-30fc-17da-5835-cecc6b937014
Accept-Encoding: gzip: timestamp="2024-05-14T21:05:13.348+1000"
2024-05-14T21:05:13.704+1000 [DEBUG] provider.terraform-provider-azurerm_v3.103.1_x5: AzureRM Response for https://management.azure.com/subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/networkInterfaces/nic-1?api-version=2022-07-01: 
HTTP/2.0 200 OK
Content-Length: 2277
Cache-Control: no-cache
Content-Type: application/json; charset=utf-8
Date: Tue, 14 May 2024 11:05:03 GMT
Etag: W/"17f8be9d-6d07-4edc-b0c9-61d2ea121bf8"
Expires: -1
Pragma: no-cache
Strict-Transport-Security: max-age=31536000; includeSubDomains
X-Cache: CONFIG_NOCACHE
X-Content-Type-Options: nosniff
X-Ms-Arm-Service-Request-Id: 23af9d5a-81e6-494a-bacb-6c48e421396a
X-Ms-Correlation-Request-Id: 3380370e-30fc-17da-5835-cecc6b937014
X-Ms-Ratelimit-Remaining-Subscription-Reads: 11999
X-Ms-Request-Id: 36c477f9-6a4a-4350-8d11-4935296623fd
X-Ms-Routing-Request-Id: AUSTRALIAEAST:20240514T110503Z:81683f1b-613b-42ef-a105-efe1eb0c5ae8
X-Msedge-Ref: Ref A: D5D380A0F8FC4760B2968436E88FAE16 Ref B: SYD03EDGE1405 Ref C: 2024-05-14T11:05:02Z

{
  "name": "nic-1",
  "id": "/subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/networkInterfaces/nic-1",
  "etag": "W/\"17f8be9d-6d07-4edc-b0c9-61d2ea121bf8\"",
  "tags": {},
  "properties": {
    "provisioningState": "Succeeded",
    "resourceGuid": "2163a589-fff9-4174-8012-d071ae24d5f0",
    "ipConfigurations": [
      {
        "name": "nic-ip-config",
        "id": "/subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/networkInterfaces/nic-1/ipConfigurations/nic-ip-config",
        "etag": "W/\"17f8be9d-6d07-4edc-b0c9-61d2ea121bf8\"",
        "type": "Microsoft.Network/networkInterfaces/ipConfigurations",
        "properties": {
          "provisioningState": "Succeeded",
          "privateIPAddress": "10.0.1.4",
          "privateIPAllocationMethod": "Static",
          "subnet": {
            "id": "/subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/virtualNetworks/vnet-1/subnets/snet-1"
          },
          "primary": true,
          "privateIPAddressVersion": "IPv4",
          "applicationSecurityGroups": [
            {
              "id": "/subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/applicationSecurityGroups/asg-1"
            }
          ]
        }
      }
    ],
    "dnsSettings": {
      "dnsServers": [],
      "appliedDnsServers": [],
      "internalDomainNameSuffix": "343y3shjrylufpz5jufohpsuoe.px.internal.cloudapp.net"
    },
    "macAddress": "00-22-48-10-28-4F",
    "enableAcceleratedNetworking": false,
    "vnetEncryptionSupported": false,
    "enableIPForwarding": false,
    "disableTcpStateTracking": false,
    "primary": true,
    "virtualMachine": {
      "id": "/subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Compute/virtualMachines/vm-1"
    },
    "hostedWorkloads": [],
    "tapConfigurations": [],
    "nicType": "Standard",
    "allowPort25Out": false,
    "auxiliaryMode": "None"
  },
  "type": "Microsoft.Network/networkInterfaces",
  "location": "australiaeast",
  "kind": "Regular"
}: timestamp="2024-05-14T21:05:13.704+1000"
2024-05-14T21:05:13.704+1000 [DEBUG] provider.terraform-provider-azurerm_v3.103.1_x5: AzureRM Request: 
PUT /subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/networkInterfaces/nic-1?api-version=2022-07-01 HTTP/1.1
Host: management.azure.com
User-Agent: Go/go1.21.6 (amd64-linux) go-autorest/v14.2.1 tombuildsstuff/kermit/v0.20240122.1123108 network/2022-07-01 HashiCorp Terraform/1.8.3 (+https://www.terraform.io) Terraform Plugin SDK/2.10.1 terraform-provider-azurerm/3.103.1 pid-222c6c49-1b0a-5959-a213-6608f9eb8820
Content-Length: 1314
Content-Type: application/json; charset=utf-8
X-Ms-Correlation-Request-Id: 3380370e-30fc-17da-5835-cecc6b937014
Accept-Encoding: gzip

{"id":"/subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/networkInterfaces/nic-1","location":"australiaeast","properties":{"auxiliaryMode":"None","disableTcpStateTracking":false,"dnsSettings":{"dnsServers":[]},"enableAcceleratedNetworking":false,"enableIPForwarding":false,"ipConfigurations":[{"id":"/subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/networkInterfaces/nic-1/ipConfigurations/nic-ip-config","name":"nic-ip-config","properties":{"applicationSecurityGroups":[{"id":"/subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/applicationSecurityGroups/asg-1"}],"loadBalancerBackendAddressPools":[{"id":"/subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/loadBalancers/lb-1/backendAddressPools/lb-backend-pool-1"}],"primary":true,"privateIPAddress":"10.0.1.4","privateIPAddressVersion":"IPv4","privateIPAllocationMethod":"Static","subnet":{"id":"/subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/virtualNetworks/vnet-1/subnets/snet-1"}},"type":"Microsoft.Network/networkInterfaces/ipConfigurations"}],"nicType":"Standard"},"tags":{}}: timestamp="2024-05-14T21:05:13.704+1000"
2024-05-14T21:05:15.414+1000 [DEBUG] provider.terraform-provider-azurerm_v3.103.1_x5: AzureRM Response for https://management.azure.com/subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/networkInterfaces/nic-1?api-version=2022-07-01: 
HTTP/2.0 400 Bad Request
Content-Length: 397
Cache-Control: no-cache
Content-Type: application/json; charset=utf-8
Date: Tue, 14 May 2024 11:05:04 GMT
Expires: -1
Pragma: no-cache
Strict-Transport-Security: max-age=31536000; includeSubDomains
X-Cache: CONFIG_NOCACHE
X-Content-Type-Options: nosniff
X-Ms-Arm-Service-Request-Id: d42ec26b-4247-4ad3-b120-d4bad398d928
X-Ms-Correlation-Request-Id: 3380370e-30fc-17da-5835-cecc6b937014
X-Ms-Ratelimit-Remaining-Subscription-Writes: 1199
X-Ms-Request-Id: af2ec724-a072-4ef3-856c-a2e8a2b5f2a9
X-Ms-Routing-Request-Id: AUSTRALIACENTRAL:20240514T110504Z:87354e8c-ac6b-49d8-9074-9a1715565226
X-Msedge-Ref: Ref A: 1F9EBB96DC0F4932ABE80D9D175BCBBD Ref B: SYD03EDGE1405 Ref C: 2024-05-14T11:05:03Z

{
  "error": {
    "code": "CannotMixIPBasedAddressesAndIPConfigurationsOnLoadBalancerBackendAddressPool",
    "message": "Mixing backend ipconfigurations and IPAddresses in backend pool /subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/loadBalancers/lb-1/backendAddressPools/lb-backend-pool-1 is not allowed.",
    "details": []
  }
}: timestamp="2024-05-14T21:05:15.414+1000"
2024-05-14T21:05:15.414+1000 [DEBUG] provider.terraform-provider-azurerm_v3.103.1_x5: Unlocking "azurerm_network_interface.nic-1": timestamp="2024-05-14T21:05:15.414+1000"
2024-05-14T21:05:15.414+1000 [DEBUG] provider.terraform-provider-azurerm_v3.103.1_x5: Unlocked "azurerm_network_interface.nic-1": timestamp="2024-05-14T21:05:15.414+1000"
2024-05-14T21:05:15.414+1000 [ERROR] provider.terraform-provider-azurerm_v3.103.1_x5: Response contains error diagnostic: @caller=github.com/hashicorp/[email protected]/tfprotov5/internal/diag/diagnostics.go:58 diagnostic_severity=ERROR tf_rpc=ApplyResourceChange tf_provider_addr=provider @module=sdk.proto diagnostic_detail="" diagnostic_summary="updating Backend Address Pool Association for Network Interface: (Name \"nic-1\" / Resource Group \"minimal_rg\"): network.InterfacesClient#CreateOrUpdate: Failure sending request: StatusCode=400 -- Original Error: Code=\"CannotMixIPBasedAddressesAndIPConfigurationsOnLoadBalancerBackendAddressPool\" Message=\"Mixing backend ipconfigurations and IPAddresses in backend pool /subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/loadBalancers/lb-1/backendAddressPools/lb-backend-pool-1 is not allowed.\" Details=[]" tf_proto_version=5.4 tf_req_id=64e7934f-b59a-8270-d003-04ce39affe55 tf_resource_type=azurerm_network_interface_backend_address_pool_association timestamp="2024-05-14T21:05:15.414+1000"
2024-05-14T21:05:15.424+1000 [DEBUG] State storage *statemgr.Filesystem declined to persist a state snapshot
2024-05-14T21:05:15.424+1000 [ERROR] vertex "azurerm_network_interface_backend_address_pool_association.my_nic_address_pool" error: updating Backend Address Pool Association for Network Interface: (Name "nic-1" / Resource Group "minimal_rg"): network.InterfacesClient#CreateOrUpdate: Failure sending request: StatusCode=400 -- Original Error: Code="CannotMixIPBasedAddressesAndIPConfigurationsOnLoadBalancerBackendAddressPool" Message="Mixing backend ipconfigurations and IPAddresses in backend pool /subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/loadBalancers/lb-1/backendAddressPools/lb-backend-pool-1 is not allowed." Details=[]
╷
│ Error: updating Backend Address Pool Association for Network Interface: (Name "nic-1" / Resource Group "minimal_rg"): network.InterfacesClient#CreateOrUpdate: Failure sending request: StatusCode=400 -- Original Error: Code="CannotMixIPBasedAddressesAndIPConfigurationsOnLoadBalancerBackendAddressPool" Message="Mixing backend ipconfigurations and IPAddresses in backend pool /subscriptions/f9226acc-94d1-46a8-af99-88fb2757df4a/resourceGroups/minimal_rg/providers/Microsoft.Network/loadBalancers/lb-1/backendAddressPools/lb-backend-pool-1 is not allowed." Details=[]
│ 
│   with azurerm_network_interface_backend_address_pool_association.my_nic_address_pool,
│   on main.tf line 132, in resource "azurerm_network_interface_backend_address_pool_association" "my_nic_address_pool":
│  132: resource "azurerm_network_interface_backend_address_pool_association" "my_nic_address_pool" {
│ 
╵
2024-05-14T21:05:15.427+1000 [DEBUG] provider.stdio: received EOF, stopping recv loop: err="rpc error: code = Unavailable desc = error reading from server: EOF"
2024-05-14T21:05:15.433+1000 [DEBUG] provider: plugin process exited: path=.terraform/providers/registry.terraform.io/hashicorp/azurerm/3.103.1/linux_amd64/terraform-provider-azurerm_v3.103.1_x5 pid=3013732
2024-05-14T21:05:15.433+1000 [DEBUG] provider: plugin exited