Copy without assign

This class has a user-defined copy constructor but no user-defined assignment operator. If the copy constructor is necessary to manage owned resources then a corresponding assignment operator is usually required. If an object of this type is assigned memory leaks and/or use-after-free errors may occur. Note that a compiler-generated assignment operator will perform only a bit-wise copy for any fields that do not have their own assignment operators defined. Class has user-written copy constructor but no user-written assignment operator
/src/mongo/db/s/operation_sharding_state.h:193: COPY_WITHOUT_ASSIGN 121881 Class "mongo::OperationShardingState::DatabaseVersionTracker" has a user-written copy constructor "mongo::OperationShardingState::DatabaseVersionTracker::DatabaseVersionTracker(mongo::OperationShardingState::DatabaseVersionTracker const &) =delete" but no corresponding user-written assignment operator.
/src/mongo/db/s/operation_sharding_state.h:196: COPY_WITHOUT_ASSIGN 121881 User-written copy constructor.