@MJ I haven't tested it yet because my installation works and I don't feel like reinstalling just yet
However, from what I've read, doing a git hard reset is what 'you should do', apparently.
My problem was that I thought I could perform a ./nodebb upgrade on an install that I did from a downloaded archive. You need to have checked it out from git. (I reckon).
@julian said in Error Upgrading from 1.10 to 1.11:
I suppose it used to assume database 0 on start, but no longer
Yeah, I was freaking out a little bit. Glad it was such an easy fix and many thanks to @PitaJ for trouble shooting it for me so quickly.