Merge pull request #5176 from kjac/v8-fix-map-usergroup-assignedusergrouppermissions

V8: Fix node permissions YSOD (mapping issue)

src/Umbraco.Web/Models/Mapping/UserMapDefinition.cs

@@ -167,6 +167,7 @@ namespace Umbraco.Web.Models.Mapping
         // Umbraco.Code.MapAll -Udi -Trashed -AdditionalData -Id -AssignedPermissions
         private void Map(IUserGroup source, AssignedUserGroupPermissions target, MapperContext context)
         {
+            target.Id = source.Id;
             target.Alias = source.Alias;
             target.Icon = source.Icon;
             target.Key = source.Key;