mysql> use centreon2_storage
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> ALTER TABLE `hoststateevents` DROP FOREIGN KEY `hoststateevents_ibfk_1`;
Query OK, 0 rows affected (0.79 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> ALTER TABLE `servicestateevents` DROP FOREIGN KEY `servicestateevents_ibfk_1`;
Query OK, 0 rows affected (2.24 sec)
Records: 0  Duplicates: 0  Warnings: 0