[ART.116.3038] Adapter Runtime (Notification): Error in Notification Callback:enableCallback notification

Facing below issue while enabling the Adapter notification :

[ART.116.3038] Adapter Runtime (Notification): Error in Notification Callback:enableCallback notification webMethods.adapterNotifications:emp_adapterNotification. [ADA.1.114] The database objects for “webMethods.adapterNotifications:emp_adapterNotification” notification already exist.
You can delete the objects and try enabling the notification again.
To delete the existing database objects use the “pub.pollingNotificationUtils:dropDatabaseObjects” service.

Please help me out.
Providing the screenshot:

What is your JDBC Adapter version and fix level?
What is your IS Core Fix level?

Have you tried executing the dropDatabaseObjects service, as mentioned in the error?
Here’s the usage info (link).

KM