Illegal mix of collations

[heurteph-ei (Philippe)]

See also official communication:

We've found a compatibility issue with MariaDB 11.5.2 and Matomo 5.1

Attention: We’ve found a compatibility issue with MariaDB 11.5.2 and Matomo 5.1 affecting archiving. We’re working on a fix, and until it’s available, we strongly recommend staying on your current MariaDB version. We will update you here once this is resolved.