I checked the WP 2.3 documentation, and tried to add the Wasabi Related Entries plugin.
There have been other posts on trying to get it to work, but I've had a new and terrifying error - my blog no longer works.
I opened up mySQL, databases, etc. and put the code into the SQL query. And I got the same error as Nevis1:
#1061 - Duplicate key name 'post_related'
HandySolo says this means the plugin did it for me the first time, but that doesn't appear to have happened in my case. Running it automatically through my dash didn't work, which is why I did it manually.
I can see the query in my history, but can't seem to get rid of it. I've restored the original index.php file, so the problem seems to be database related (as you can see here).
How do I 'de-run' the query and restore my database? I just want to pretend like I never did this.