I have been running 6.11.3-stable for some time. In March 2022, I tried manually upgrading to whatever version was the latest stable version at that time. While the upgrade worked, the skin had issues. I use pixelgreen. There were issues with the link configuration at the top right of the screen and things were out of place. I attempted to fix it, which caused more issues that broke the blog completely, so I had my webhost restore to a backup point. The blogs were working again, and I did not try to upgrade again at that time.

I tried to upgrade from 6.11.3-stable to 7.2.5-stable on Jan 29 2023, but was immediately stuck on an error: Table 'evo_widget_widget' already exists(Errno=1050). I did not take screenshots of what I tried, but there were links to do some sort of checks but they didn't help. Since I was in over my head and running short on time, I tried to go back to the previous version 6.11.3-stable, but it failed. I admit, in the last few years, trying to complete and troubleshoot the upgrades have been over my head and I'm sure my lack of knowledge is the reason these things aren't working. I just had the webhost restore to a backup point again. The last time I had the webhost restore to a backup point, the blogs just worked. This time, that did not happen.

So, as of right now, the backup files are there, but I have an error:
Database schema is not up to date!
You have schema version «16170», but we would need «13220».

I don't know how to find out the PHP version or the MySQL/MariaDB version as requested.

I don't know what to do from here. I have tried following the similar threads in the forum, but it's beyond my comprehension and I don't want to make a mess of things again. Please let me know what my next steps should be.

Note: I am also concerned that if I do get to the latest version of 7.2.5-stable that the pixelgreen skin might then have errors based on this thread: https://forums.b2evolution.net/the-skin-files-are-missing-message-what-to I've been running my blogs since 2010 and have used this skin for a long time. I'm not necessarily opposed to using a new skin, but I have years of content that I'm not sure would work in another skin without having to do a lot of manual editing.

Thank you!