Just started 2.5 - 3 migration with Virtuemart.
Currently my backup in sub folder is using
Joomla! 3.7.0 Stable
PHP Version 5.6.29
VirtueMart 3.2.1
I haven't installed a new template yet.
When I go to Virtuemart - Orders, I get an error on a white page below the Joomla CP links.
An error has occurred. 1054 Unknown column 'u.customer_note' in 'field list'
On the front end, everything looks normal even though my template is seriously outdated but when I click on any links I get an error 404 - Category not found (white and red page). Not sure if this is a separate issue.
My programmer friend said that VM has its own upgrade path.
There is a missing field in the table
It happen between two different version of data base
There must be an upgrade transition Script.
I have no idea! What that means. Help! What do I do now?
https://docs.virtuemart.net/tutorials/installation-migration-upgrade/198-upgrade-virtuemart-2-to-virtuemart-3.html
http://forum.virtuemart.net/index.php?topic=126862.0
and stickies and FAQ here in this forum. You should read this first. It is quite easy.