Hello Vusal,
The way to delete the event logs from EP/Console would be to set the Retention Buckets where you will provide Log Sources as the filter.
Once this configuration is done, perform a full deploy and then monitor if the events are deleted after the specified time period for the particular log source.
This is the correct approach to delete event logs.
If there are any issues with Retention Bucket, you may open a support case for further investigation.
Thanks!
Ashish Kothekar
#QRadar#Support#SupportMigration