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|
```
extern const int UNFINISHED;
    extern const int RECEIVED_ERROR_TOO_MANY_REQUESTS;
    extern const int PART_IS_TEMPORARILY_LOCKED;
    extern const int CANNOT_ASSIGN_OPTIMIZE;
    extern const int KEEPER_EXCEPTION;
    extern const int ALL_REPLICAS_LOST;
    extern const int REPLICA_STATUS_CHANGED;
    extern const int CANNOT_ASSIGN_ALTER;
    extern const int DIRECTORY_ALREADY_EXISTS;
    extern const int ILLEGAL_TYPE_OF_ARGUMENT;
    extern const int UNKNOWN_POLICY;
    extern const int NO_SUCH_DATA_PART;
    extern const int INTERSERVER_SCHEME_DOESNT_MATCH;
    extern const int DUPLICATE_DATA_PART;
    extern const int BAD_ARGUMENTS;
    extern const int CONCURRENT_ACCESS_NOT_SUPPORTED;
    extern const int CHECKSUM_DOESNT_MATCH;
}
namespace ActionLocks
{
    extern const StorageActionBlockType PartsMerge;
    extern const StorageActionBlockType PartsFetch;
    extern const StorageActionBlockType PartsSend;
    extern const StorageActionBlockType ReplicationQueue;
    extern const StorageActionBlockType PartsTTLMerge;
    extern const StorageActionBlockType PartsMove;
}
static const auto QUEUE_UPDATE_ERROR_SLEEP_MS        = 1 * 1000;
static const auto MUTATIONS_FINALIZING_SLEEP_MS      = 1 * 1000;
static const auto MUTATIONS_FINALIZING_IDLE_SLEEP_MS = 5 * 1000;