UPDATE:
After manually configuring the DB for the above change (as well as a few more it had trouble with). I got the update process to run up until 5.1, then I got a white screen when it tried updating to 5.2. Because I had no idea if the update had actually worked, I removed the installer to check on the CP. Oddly, the CP seems fine and says I’m running the latest 5.2 but my config file still says 5.1, which suggests the update process didn’t actually finish.
How can I make sure the update has been successful, and that this attempt won’t cause problems with future updates?
Any ideas, suggestions appreciated.