diff --git a/modules/Microsoft.Resources/resourceGroups/.bicep/nested_roleAssignments.bicep b/modules/Microsoft.Resources/resourceGroups/.bicep/nested_roleAssignments.bicep
index 217c4a6b8d..c504d8b807 100644
--- a/modules/Microsoft.Resources/resourceGroups/.bicep/nested_roleAssignments.bicep
+++ b/modules/Microsoft.Resources/resourceGroups/.bicep/nested_roleAssignments.bicep
@@ -226,7 +226,7 @@ var builtInRoleNames = {
 }
 
 resource roleAssignment 'Microsoft.Authorization/roleAssignments@2022-04-01' = [for principalId in principalIds: {
-  name: guid(last(split(resourceId, '/')), principalId, roleDefinitionIdOrName)
+  name: guid(resourceId, principalId, roleDefinitionIdOrName)
   properties: {
     description: description
     roleDefinitionId: contains(builtInRoleNames, roleDefinitionIdOrName) ? builtInRoleNames[roleDefinitionIdOrName] : roleDefinitionIdOrName
diff --git a/modules/Microsoft.Resources/resourceGroups/version.json b/modules/Microsoft.Resources/resourceGroups/version.json
index 56f8d9ca40..badc0a2285 100644
--- a/modules/Microsoft.Resources/resourceGroups/version.json
+++ b/modules/Microsoft.Resources/resourceGroups/version.json
@@ -1,4 +1,4 @@
 {
     "$schema": "https://raw.githubusercontent.com/dotnet/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-    "version": "0.4"
+    "version": "0.5"
 }