Sorry for my english ...
I'm new to the forum, I need your help!
I'm trying to upgrade from OpenCart version 18.104.22.168 to version 22.214.171.124.
The error in question is this:
Error Code(0): Error: Can't DROP 'PRIMARY'; check that column/key exists
Error No: 1091
ALTER TABLE `category` DROP PRIMARY KEY, ADD PRIMARY KEY(`category_id`, `parent_id`) in
.../system/library/db/mysqli.php on line 40
thanks in advance for your reply,