Find missing objects behind menu items
As part of our code cleanup exercise we have discovered that there were menu items pointing to objects which no longer exists in our environments, ie. legacy reports which were upgraded to SSRS but their menu items were never removed.
The following job could be used to identify such missing objects for any of your menu items. I would also recommend to double-check the xRef references to find connected objects, like security privileges/roles, to completely remove whatever you do not need.