Class of notificationid 3452 is not an extension of vB_Notification

[kimtan]

Hi,

Everytime I created a thread, and if someone replied on it, I got this notification:

"Class of notificationid 3452 is not an extension of vB_Notification"

There is no addon on my site and I already reupload fresh files but still go that issues.

my vbuleltin 5 version is vbulletin 5.1.9 PL3

Thanks,

[kimtan]

Okay, I just fixed my own issue.

It seems that the datastore is not updating.

The problem was on the datastore table

I find with this title 'vBNotificationTypes' and then I install a fresh version of 5.1.9 then copy the value of 'vBNotificationTypes' to my current forum.

I believe during an upgrade it should flush the datastore, right? what could be the problem why the value of 'vBNotificationTypes' is still old?