I think this is the same issue as reported in https://bugs.mysql.com/bug.php?id=106352 (which will be fixed in upcoming 8.0.29)
** Bug watch added: MySQL Bug System #106352 http://bugs.mysql.com/bug.php?id=106352 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1961617 Title: String returned when DATETIME expected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mysql-8.0/+bug/1961617/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
