Data race condition

The value of the shared data will be determined by the interleaving of thread execution. Thread shared data is accessed without holding an appropriate lock, possibly causing a race condition
/test/model/src/include/model/kv_transaction.h:97: MISSING_LOCK 139732 Accessing "this->_updates" without holding lock "model::kv_transaction._lock". Elsewhere, "model::kv_transaction._updates" is written to with "kv_transaction._lock" held 1 out of 1 times.