mysql> select count(*) from mdl_backup_logs;
*************************** 1. row ***************************
count(*): 0
1 row in set (0.00 sec)

mysql> select count(*) from backup_logs;
*************************** 1. row ***************************
count(*): 0
1 row in set (0.03 sec)

mysql> insert into mdl_backup_logs ( backupid, message ) values ( 0, 'testing table insert' );
Query OK, 1 row affected, 2 warnings (0.00 sec)

mysql> select * from mdl_backup_logs;
*************************** 1. row ***************************
         id: 1
   backupid: 0
   loglevel: 0
    message: testing table insert
timecreated: 0
1 row in set (0.00 sec)

mysql> insert into backup_logs ( backupid, message ) values ( 0, 'testing table insert' );
Query OK, 1 row affected, 2 warnings (0.00 sec)

mysql> select * from backup_logs;
*************************** 1. row ***************************
         id: 1
   backupid: 0
   loglevel: 0
    message: testing table insert
timecreated: 0
1 row in set (0.00 sec)