Blocker, can not login as user after installing Matomo

[wespe]

Hi,
after installing i got this error message:

Ein Fehler vom Typ E_ERROR wurde in der Zeile 407 der Datei /home/user/website/wp-content/plugins/matomo/classes/WpMatomo/Db/WordPress.php verursacht. Fehlermeldung: Uncaught Zend_Db_Statement_Exception: WP DB Error: [1062] Duplicate entry 'admin@mydomain.de' for key 'uniq_email' in /home/user/website/wp-content/plugins/matomo/classes/WpMatomo/Db/WordPress.php:407

any hints how to deal with that?
thanks

[wespe]

ups, googling that error could help
i’ll try this first:

DB-error - Matomo not working

Hello! This is my first post - so please bear with me if I do anything wrong here in the forum ;-). I have the following problem. I have successfully installed Matomo on Premise in my WordPress-website. Everything worked fine until I added a new administrator. When I try to open Matomo with this new admin account, I either get the message that there is a fatal error or I get the following message when I call the reports: WP DB Error: [1062] Duplicate entry ‘admin-name’ for key ‘uniq_email’. …

and will come back