Same issue for me.
while performing the automated upgrade, i got the message:
"Upgrade
Your OSClass installation can be auto-upgraded. Please, back up your database and the folder oc-content before attempting to upgrade your OSClass installation. You can also upgrade OSClass manaully, more information in the Wiki
Checking for updates (Current version 302)New version to update: 310
Upgrading your OSClass installation (this could take a while):Problems when upgrading the database
We had some errors upgrading your database. The follwing queries failed:ALTER TABLE oc_t_alerts ADD COLUMN pk_i_id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT"
when running the query manually on the db using phpmyadmin, i see the message:
#1075 - Incorrect table definition; there can be only one auto column and it must be defined as a key
i think perhaps the sql update script needs to include the primary key assignment in the same alter statement?