Bicep Management Group template cycle error

deploy.ps1

New-AzTenantDeployment -TemplateFile .\managementGroups.bicep -TemplateParameterFile .\managementGroupsHierarchy.parameters.json -Location eastus

managementGroup.bicep

targetScope = 'tenant'

param parParentManagmentGroupId string
param parManagementGroupName string
param parManagementGroupDisplayName string
param parChildrenManagementGroups array = []

resource resParentedManagementGroup 'Microsoft.Management/managementGroups@2021-04-01' = if(!empty(parParentManagmentGroupId)) {
  name: parManagementGroupName
  properties: {
    displayName: parManagementGroupDisplayName
    details: {
      parent: {
        id: parParentManagmentGroupId
      }
    }
  }
}

resource resManagementGroup 'Microsoft.Management/managementGroups@2021-04-01' = if(empty(parParentManagmentGroupId)) {
  name: parManagementGroupName
  properties: {
    displayName: parManagementGroupDisplayName
    details: {
    }
  }
}

module modChildrenManagementGroups 'managementGroups.bicep' = if (length(parChildrenManagementGroups) > 0) {
  name: '${parManagementGroupName}-children'
  params: {
    parParentManagmentGroupId: if(empty(parParentManagmentGroupId)) ? resManagementGroup.id : resParentedManagementGroup.id
    parManagementGroupHierarchy: parChildrenManagementGroups
  }
}

managementGroups.bicep

targetScope = 'tenant'

@description('Resource ID of the parent Management Group')
param parParentManagmentGroupId string = ''

@description('Management group hierarchy to be deployed.')
param parManagementGroupHierarchy array

module modManagementGroup 'managementGroup.bicep' = [for (mg, i) in parManagementGroupHierarchy: {
  name: '${mg.name}'
  params: {
    parParentManagmentGroupId: parParentManagmentGroupId
    parManagementGroupName: mg.name
    parManagementGroupDisplayName: mg.displayName
    parChildrenManagementGroups: mg.children
  }
}]

managementGroupsHierarchy.parameters.json

{
    "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentParameters.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "parManagementGroupHierarchy": {
            "value": [
                {
                    "name": "alz",
                    "displayName": "Azure Landing Zones",
                    "children": [
                        {
                            "name": "alz-decommissioned",
                            "displayName": "Decommissioned",
                            "children": []
                        },
                        {
                            "name": "alz-landingzones",
                            "displayName": "Landing Zones",
                            "children": [
                                {
                                    "name": "alz-landingzones-corp",
                                    "displayName": "Corp",
                                    "children": []
                                },
                                {
                                    "name": "alz-landingzones-online",
                                    "displayName": "Online",
                                    "children": []
                                }
                            ]
                        },
                        {
                            "name": "alz-platform",
                            "displayName": "Platform",
                            "children": [
                                {
                                    "name": "alz-platform-connectivity",
                                    "displayName": "Connectivity",
                                    "children": []
                                },
                                {
                                    "name": "alz-platform-identity",
                                    "displayName": "Identity",
                                    "children": []
                                },
                                {
                                    "name": "alz-platform-management",
                                    "displayName": "Management",
                                    "children": []
                                }
                            ]
                        },
                        {
                            "name": "alz-sandbox",
                            "displayName": "Sandbox",
                            "children": []
                        }
                    ]
                }
            ]
        }
    }
}