I am trying to upgrade EE 1.6.8 to EE 2.5.1
However, the upgrade process stopped at the end (I saw version was upgraded to 2.5.0 on the screen) with the following error message.
A Database Error Occurred
Error Number: 1054
Unknown column ‘ref_ip’ in ‘exp_comments’
ALTER TABLE `exp_comments` CHANGE `ref_ip` `ref_ip` varchar(45)
Filename: database/DB_driver.php
Line Number: 330
Can I apply the same trick in the Bug Tracker? Looks to me it is the same table, but different PHP files.