The first commit towards the fix was plausible, though still not fully correct, but in the end not only it wasn't able to fix it, each commit was also becoming more and more baroque. I cut it when it wrote almost 100 lines of code to compare version numbers (which already existed in the source). The problem with discussing the plan is that, while debugging, you don't yourself have a full idea of the plan.
I don't call it a total failure because I asked the AI to improve some error messages to help it debug, and I will keep that code. It's pretty good at writing new code, very good at reviewing it, but for me it was completely incapable of performing maintainance.