I am deploying an AKS cluster using an Azure template. Most of the time deploying the AKS cluster succeeds. But sometimes, with the same inputs the deployment fails with Operation PutNetworkSecurityGroupOperation (XXXXXXXX) was canceled and superseded by operation PutNetworkSecurityGroupOperation. The azure template and deployment error are included below. What could cause this issue?

Template

{
  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "resourceGroupName": {
      "type": "string",
      "metadata": {
        "description": "The resource group name."
      }
    },
    "subscriptionId": {
      "type": "string",
      "metadata": {
        "description": "The subscription id."
      }
    },
    "region": {
      "type": "string",
      "metadata": {
        "description": "The region of AKS resource."
      }
    },
    "gbPerNode": {
      "type": "int",
      "defaultValue": 20,
      "metadata": {
        "description": "Disk size (in GB) to provision for each of the agent pool nodes. This value ranges from 0 to 1023. Specifying 0 will apply the default disk size for that agentVMSize."
      },
      "minValue": 1,
      "maxValue": 1023
    },
    "numNodes": {
      "type": "int",
      "defaultValue": 3,
      "metadata": {
        "description": "The number of agent nodes for the cluster."
      },
      "minValue": 1,
      "maxValue": 50
    },
    "machineType": {
      "type": "string",
      "defaultValue": "Standard_D2_v2",
      "metadata": {
        "description": "The size of the Virtual Machine."
      }
    },
    "servicePrincipalClientId": {
      "metadata": {
        "description": "Client ID (used by cloudprovider)"
      },
      "type": "securestring"
    },
    "servicePrincipalClientSecret": {
      "metadata": {
        "description": "The Service Principal Client Secret."
      },
      "type": "securestring"
    },
    "osType": {
      "type": "string",
      "defaultValue": "Linux",
      "allowedValues": [
        "Linux"
      ],
      "metadata": {
        "description": "The type of operating system."
      }
    },
    "kubernetesVersion": {
      "type": "string",
      "defaultValue": "1.11.5",
      "metadata": {
        "description": "The version of Kubernetes."
      }
    },
    "maxPods": {
      "type": "int",
      "defaultValue": 30,
      "metadata": {
        "description": "Maximum number of pods that can run on a node."
      }
    }
  },
  "variables": {
    "deploymentEventTopic": "deploymenteventtopic",
    "resourceGroupName": "[parameters('resourceGroupName')]",
    "omswsName": "[concat('omsws-', parameters('resourceGroupName'))]",
    "clustername": "cluster"
  },
  "resources": [
    {
      "apiVersion": "2018-03-31",
      "type": "Microsoft.ContainerService/managedClusters",
      "location": "[parameters('region')]",
      "name": "[variables('clustername')]",
      "properties": {
        "kubernetesVersion": "[parameters('kubernetesVersion')]",
        "enableRBAC": true,
        "dnsPrefix": "clust",
        "addonProfiles": {
          "httpApplicationRouting": {
            "enabled": true
          },
          "omsagent": {
            "enabled": false
          }
        },
        "agentPoolProfiles": [
          {
            "name": "agentpool",
            "osDiskSizeGB": "[parameters('gbPerNode')]",
            "count": "[parameters('numNodes')]",
            "vmSize": "[parameters('machineType')]",
            "osType": "[parameters('osType')]",
            "storageProfile": "ManagedDisks"
          }
        ],
        "servicePrincipalProfile": {
          "ClientId": "[parameters('servicePrincipalClientId')]",
          "Secret": "[parameters('servicePrincipalClientSecret')]"
        },
        "networkProfile": {
          "networkPlugin": "kubenet"
        }
      }
    }
  ]
}

Error

{
   "code":"DeploymentFailed",
   "message":"At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/arm-debug for usage details.",
   "details":[
      {
         "code":"Conflict",
         "message":"{\r\n \"status\": \"Failed\",\r\n \"error\": {\r\n \"code\": \"ResourceDeploymentFailure\",\r\n \"message\": \"The resource operation completed with terminal provisioning state 'Failed'.\",\r\n \"details\": [\r\n {\r\n \"code\": \"Canceled\",\r\n \"message\": \"Operation was canceled.\",\r\n \"details\": [\r\n {\r\n \"code\": \"Canceled\",\r\n \"message\": \"Operation was canceled.\",\r\n \"details\": [\r\n {\r\n \"code\": \"CanceledAndSupersededDueToAnotherOperation\",\r\n \"message\": \"Operation PutNetworkSecurityGroupOperation (XXXXXXX) was canceled and superseded by operation PutNetworkSecurityGroupOperation (XXXXX).\"\r\n }\r\n ]\r\n }\r\n ]\r\n }\r\n ]\r\n }\r\n}"
      }
   ]
}