if (isSnapshotRead) {
        std::set<ShardId> shardIds = {shardId};
        atClusterTime = computeAtClusterTime(opCtx, shardIds);
        bool isSameShardIds = verifyTargetedShardsAtClusterTime(opCtx, shardIds, atClusterTime);
        if (!isSameShardIds) {  // use the current clusterTime if chunks moved
            atClusterTime = LogicalClock::get(opCtx)->getClusterTime();
        }
    }