Please note that the only procedures supported and maintained by Centreon are those published in the official documentation. If you have a question about this article, post it in the comments.
Symptom
With the most recent minor versions, the following warning is displayed when you export the configuration with this option ticked:

Configuration mechanism used: legacy Reading main configuration file /var/cache/centreon/config/engine/1/centengine.DEBUG. The option auto_rescheduling_interval is no longer available. This option is deprecated. The option auto_rescheduling_window is no longer available. This option is deprecated. The option auto_reschedule_checks is no longer available. This option is deprecated. Reading resource file /var/cache/centreon/config/engine/1/resource.cfg Checking global event handlers... Checking obsessive compulsive processor commands...
Please note that the purpose of this message is to inform you that the following options are deprecated and may be removed in the future:
Configuration > Pollers > Engine configuration > Centreon Engine Central > Tuning :

Solution
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To hide these messages, update the relevant entries in the database:
mysql -e "SELECT auto_rescheduling_interval,auto_reschedule_checks,auto_rescheduling_window FROM centreon.cfg_nagios"
mysql -e "UPDATE centreon.cfg_nagios SET auto_rescheduling_interval = NULL,auto_reschedule_checks = NULL,auto_rescheduling_window = NULL"
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Try exporting the configuration again:

As you can see, the warning isn’t displayed anymore when the value is NULL in the database.