I am trying to create a VM from an existing Os disk image that has been created by another module. I am getting the error below

Cannot attach an existing OS disk if the VM is created from a platform, user or a shared gallery image. (Code: InvalidParameter, Target: osDisk)

The code is from a decompiled arm template, I can see its missing the local login password. At this stage I am trying to get it to work to build a VM. I did some research ad found a user with a similar issue here , however the code/solution is incomplete and thus I could not follow it.

@description('The virtual machine parameter object.')
param vm object

@description('The tagging object.')
param tagging object

@description('The Network security rules ID')
param nsg_id string

@description('The Network interface card ID')
param nic_id string

@description('The managed disk ID')
param os_disk_id string


resource virtualMachines_azsdevinf001_name_resource 'Microsoft.Compute/virtualMachines@2023-03-01' = {
  name: vm.vm_name
  location: vm.location
  tags: tagging.tags
  identity: {
    type: 'SystemAssigned'
  }
  properties: {
    hardwareProfile: {
      vmSize: vm.vmSize
    }
    storageProfile: {
      imageReference: {
        publisher: 'MicrosoftWindowsServer'
        offer: 'WindowsServer'
        sku: vm.sku
        version: 'latest'
      }
      osDisk: {
        osType: vm.osType
        name: '${vm.vm_name}-osdisk'
        createOption: 'Attach'
        caching: 'ReadWrite'
        writeAcceleratorEnabled: false
        managedDisk: {
          id: os_disk_id
          storageAccountType: 'StandardSSD_LRS'
        }
        deleteOption: 'Detach'
      }
      dataDisks: []
    }
    
    osProfile: {
      computerName: vm.vm_name
      adminUsername: 'localadministrator'
      windowsConfiguration: {
        provisionVMAgent: true
        enableAutomaticUpdates: true
        patchSettings: {
          patchMode: 'AutomaticByPlatform'
          automaticByPlatformSettings: {
            bypassPlatformSafetyChecksOnUserSchedule: true
          }
          assessmentMode: 'AutomaticByPlatform'
          enableHotpatching: false
        }
        timeZone: 'GMT Standard Time'
        winRM: {
          listeners: []
        }
        enableVMAgentPlatformUpdates: false
      }
      secrets: []
      allowExtensionOperations: true
      requireGuestProvisionSignal: true
    }
    networkProfile: {
      networkInterfaces: [
        {
          id: nic_id
          properties: {
            primary: true
          }
        }
      ]
    }
    diagnosticsProfile: {
      bootDiagnostics: {
        enabled: true
        storageUri: 'xxxx'
      }
    }
    licenseType: 'Windows_Server'
    priority: 'Regular'
    extensionsTimeBudget: 'PT1H30M'
  }
}