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I upgraded from version 5 to version 6.6. As suggested, I did this in a staging environment. I followed your upgrade instructions precisely, but when I get to the database upgrade, it fails. I had a tech person check it out, and he said that the problem was with the plugin. Here is what he told me:
“Indeed, at the latest stage (Forum > Upgrade Simple:Press) the task goes on indefinitely.The error in the logs is as follows:
Code:
[Mon Jan 07 07:59:15.857457 2019] [:error] [pid 7953] [client 195.24.55.58:43666] WordPress database error Unknown column ‘permalink_slug’ in ‘field list’ for query SELECT forum_slug, permalink_slug FROM wp_sfforums made by require_once(‘wp-load.php’), require_once(‘wp-config.php’), require_once(‘wp-settings.php’), include_once(‘/plugins/simplepress/sp-control.php’), SP, spcSimplePress::instance, spcSimplePress->startup, spcCoreLoader->load, spcPermalinks->__construct, spcPermalinks->load, spcDB->select, spcDB->executeSelect, referer: https://staging2.thaihealingmassage.com/wp-admin/admin.php?page=simplepress%2Fsp-startup%2Fsp-load-install.php
This looks like a development error, related to the package that was downloaded.
There is no column “permalink_slug” in the database, but apparently the update script looks for one.
I would recommend that you contact the plugin developers and forward the error to them. They should be able to tell what exactly goes wrong.”