mysql 又机热备，刚配好时，就正常的。用了一会就会把错

348296827

我用的是：mysql 5.1.61 同步：mysql 5.0.95.
刚配好时，是好的。用了一会，数据变大了，就把错了。
server-id       = 2
##############
log-bin=mysql-bin
log-bin=/var/log/mysql/updatelog
binlog-do-db=test
max_binlog_size=1048576000
replicate-same-server-id
master-host=172.16.1.112
master-user=backup
master-password=qawsed
master-port=3306
master-connect-retry=60
replicate-do-db=posp
binlog-ignore-db=mysql
slave_skip_errors = 1062
skip-name-resolve
max_connections=1000
max_connect_errors=100

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 172.16.1.112
                  Master_User: backup
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: updatelog.000001
          Read_Master_Log_Pos: 1028145
               Relay_Log_File: mysqld-relay-bin.000002
                Relay_Log_Pos: 638838
        Relay_Master_Log_File: updatelog.000001
             Slave_IO_Running: Yes
            Slave_SQL_Running: No
              Replicate_Do_DB: posp
          Replicate_Ignore_DB:
           Replicate_Do_Table:
       Replicate_Ignore_Table:
      Replicate_Wild_Do_Table:
  Replicate_Wild_Ignore_Table:
                   Last_Errno: 1054
                   Last_Error: Error 'Unknown column 'large_small_flag' in 'field list'' on query. Default database: 'posp'. Query: 'UPDATE `acq_merchant` SET `large_small_flag`='0' WHERE (`id`='1')'
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 693399
              Relay_Log_Space: 974033
              Until_Condition: None
               Until_Log_File:
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
           Master_SSL_CA_File:
           Master_SSL_CA_Path:
              Master_SSL_Cert:
            Master_SSL_Cipher:
               Master_SSL_Key:
        Seconds_Behind_Master: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error:
               Last_SQL_Errno: 1054
               Last_SQL_Error: Error 'Unknown column 'large_small_flag' in 'field list'' on query. Default database: 'posp'. Query: 'UPDATE `acq_merchant` SET `large_small_flag`='0' WHERE (`id`='1')'
1 row in set (0.00 sec)

ERROR:
No query specified
############
报错日志：
130426 10:57:37 [Note] Slave I/O thread killed while reading event
130426 10:57:37 [Note] Slave I/O thread exiting, read up to log 'updatelog.000001', position 997828
130426 10:57:39 [Note] Slave SQL thread initialized, starting replication in log 'updatelog.000001' at position 693399, relay log './mysqld-relay-bin.000002' position: 638838
130426 10:57:39 [ERROR] Slave SQL: Error 'Unknown column 'large_small_flag' in 'field list'' on query. Default database: 'posp'. Query: 'UPDATE `acq_merchant` SET `large_small_flag`='0' WHERE (`id`='1')', Error_code: 1054
130426 10:57:39 [Warning] Slave: Unknown column 'large_small_flag' in 'field list' Error_code: 1054
130426 10:57:39 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'updatelog.000001' position 693399
130426 10:57:39 [Note] Slave I/O thread: connected to master 'backup@172.16.1.112:3306',replication started in log 'updatelog.000001' at position 997828

那位高人帮忙看下。
网上说的重起change master to 我弄了，也是得一会，半个小时后，又会报同样的错。