We use Clickhouse version 22.3.3.44, and met with with some wrong behaviour - 
queries "ALTER TABLE ... MODIFY COMMENT ... " does not work on ReplicatedMergeTree engine.

Bug reproduce script:
```
CREATE TABLE sandbox.test__calendar
(
    `dttm` DateTime COMMENT 'date and time',
    `timestamp` Int64 COMMENT 'event timestamp',
    `year_num` Int32 COMMENT 'year number'
)
ENGINE = ReplicatedMergeTree() PARTITION BY year_num ORDER BY timestamp
COMMENT 'Comment text for test table';

SELECT comment FROM system.tables WHERE name like 'test__calendar'; -- 1 row selected with correct comment text

ALTER TABLE sandbox.test__calendar MODIFY COMMENT 'Some new more detailed text of comment';

SELECT comment FROM system.tables WHERE name like 'test__calendar'; -- 1 row selected, but with OLD(!) comment text
```

Maybe it will be helpfull, ALTER TABLE query returns such result:
```
host            |status|error|num_hosts_remaining|num_hosts_active|
----------------+------+----+-----------------------+------------------+
10.7.179.41     |     0|    |                      1|                 0|
ak1-st-data-01  |     0|    |                      0|                 0|
```
, merger_mutator(*this, getContext()->getMergeMutateExecutor()->getMaxTasksCount())
    , merge_strategy_picker(*this)
    , queue(*this, merge_strategy_picker)
    , fetcher(*this)
    , cleanup_thread(*this)
    , part_check_thread(*this)
    , restarting_thread(*this)
    , part_moves_between_shards_orchestrator(*this)
    , renaming_restrictions(renaming_restrictions_)
    , replicated_fetches_pool_size(getContext()->getSettingsRef().background_fetches_pool_size)
    , replicated_fetches_throttler(std::make_shared<Throttler>(getSettings()->max_replicated_fetches_network_bandwidth, getContext()->getReplicatedFetchesThrottler()))
    , replicated_sends_throttler(std::make_shared<Throttler>(getSettings()->max_replicated_sends_network_bandwidth, getContext()->getReplicatedSendsThrottler()))
{
    queue_updating_task = getContext()->getSchedulePool().createTask(
        getStorageID().getFullTableName() + " (StorageReplicatedMergeTree::queueUpdatingTask)", [this]{ queueUpdatingTask(); });
    mutations_updating_task = getContext()->getSchedulePool().createTask(
        getStorageID().getFullTableName() + " (StorageReplicatedMergeTree::mutationsUpdatingTask)", [this]{ mutationsUpdatingTask(); });
    merge_selecting_task = getContext()->getSchedulePool().createTask(
        getStorageID().getFullTableName() + " (StorageReplicatedMergeTree::mergeSelectingTask)", [this] { mergeSelectingTask(); });
    
    merge_selecting_task->deactivate();
    mutations_finalizing_task = getContext()->getSchedulePool().createTask(
        getStorageID().getFullTableName() + " (StorageReplicatedMergeTree::mutationsFinalizingTask)", [this] { mutationsFinalizingTask(); });
    if (getContext()->hasZooKeeper() || getContext()->hasAuxiliaryZooKeeper(zookeeper_name))
    {