@Vikash_Singh, if this is consistently happening with the same VDS, try rebuilding that VDS and all of the VDS it depends on, but with different and unique names for each (ones that you’ve never chosen before). As suggested in the other comment thread, this likely has to do with a duplicate names and some change to the VDS graph.
A “fresh” set of VDS with different names (but basically the same SQL), will give you the same query results, but hopefully not the error.