Mysqli statement execute error : Duplicate entry '' for key 'unique_token'


#1

I’ve recently stopped to receive my EMail notifications so I checked the dashboard and saw that the system stopped tracking altogether. I did the update for Matomo and updated everything on the server.
This is the current version:
Matomo-Version: 3.6.0
MySQL-Version: 5.7.23-0ubuntu0.16.04.1
PHP-Version: 7.0.30-0ubuntu0.16.04.1

Now the system is tracking again, but when I want to send the tracking Email manually I receive the follwing error:

Mysqli statement execute error : Duplicate entry ‘’ for key ‘unique_token’

I have literally no clue what that means. So somebody please help me please :disappointed_relieved:

Thank you!


#2

If anybody cares, I fixed this problem by simply deleting the reports and creating new ones.