ARM to Bicep decompile error - The property "scope" expected a value of type "resource" but the provided value is of type "string"

[mahalel]

Bicep version

Bicep CLI version 0.15.31 (3ba6e06a8d)

Describe the bug

When attempting to decompile an ARM template for Microsoft.SecurityInsights/alertRules into a Bicep file, the conversion will present the following error:

/tmp/Fusion_tmp.bicep(7,10) : Error BCP036: The property "scope" expected a value of type "resource" but the provided value is of type "string".

To Reproduce
Steps to reproduce the behavior:

ARM file:

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspaceName": {
      "type": "string"
    },
    "enabled": {
      "type": "bool",
      "defaultValue": true
    }
  },
  "variables": {
    "ruleId": "f71aba3d-28fb-450b-b192-4e76a83015c8"
  },
  "resources": [
    {
      "type": "Microsoft.SecurityInsights/alertRules",
      "apiVersion": "2023-02-01-preview",
      "name": "[variables('ruleId')]",
      "scope": "[concat('Microsoft.OperationalInsights/workspaces/', parameters('workspaceName'))]",
      "kind": "Fusion",
      "properties": {
        "enabled": "[parameters('enabled')]",
        "alertRuleTemplateName": "f71aba3d-28fb-450b-b192-4e76a83015c8"
      }
    }
  ]
}

The expected Bicep output (valid):

param workspaceName string
param enabled bool = true

var ruleId = 'f71aba3d-28fb-450b-b192-4e76a83015c8'

resource Fusion 'Microsoft.SecurityInsights/alertRules@2022-10-01-preview' = {
  scope: workspace
  name: ruleId
  kind: 'Fusion'
  properties: {
    enabled: enabled
    alertRuleTemplateName: 'f71aba3d-28fb-450b-b192-4e76a83015c8'
  }
}
resource workspace 'Microsoft.OperationalInsights/workspaces@2022-10-01' existing = {
    name: workspaceName
}

Additional context

I have tried setting the scope in the ARM file to the exact name of the workspace as well, but I get the same error.

[brwilkinson]

I believe we have this covered over here:

• Iteration with a child resource Error: required properties: "scope" #6010

This warning exists prior to the decompilation as well i.e. in the ARM template on the 'type'