And waits for them. That's pointless.
if (part->getBytesOnDisk() > max_source_part_size_for_mutation)
                        continue;
                    std::optional<std::pair<Int64, int>> desired_mutation_version = merge_pred.getDesiredMutationVersion(part);
                    if (!desired_mutation_version)
                        continue;
                    create_result = createLogEntryToMutatePart(
                        *part,
                        future_merged_part.uuid,
                        desired_mutation_version->first,
                        desired_mutation_version->second,
                        merge_pred.getVersion());
                    if (create_result == CreateMergeEntryResult::Ok)
                        break;
                }
            }
        }
    }
    catch (...)
    {
        tryLogCurrentException(log, __PRETTY_FUNCTION__);
    }
    if (!is_leader)
        return;
    if (create_result != CreateMergeEntryResult::Ok
        && create_result != CreateMergeEntryResult::LogUpdated)
    {
        merge_selecting_task->scheduleAfter(MERGE_SELECTING_SLEEP_MS);
    }
    else
    {