Starting from Sentinel 8.x, the size of the Message (msg) event field has been increased from 4000 to 8000 characters to accommodate more information in the field.
If you have created a data synchronization policy in previous versions of Sentinel that synchronizes the Message (msg) event field to an external database, you must increase the size of the appropriate mapped column in the external database accordingly.
NOTE:The above step is applicable only if you are upgrading previous versions of Sentinel to 8.x.