Hello,
how did you upgrade? From the other comment, it seems you are using IPFS Desktop. IPFS Desktop for 0.5.0 has not been released yet (it’s on the works).
It seems that you installed a newer go-ipfs manually and now you are trying to start the old go-ipfs with Desktop (?).
Options are:
- Do not run Desktop and run 0.5.0 ipfs manually from the command line
- Downgrade ipfs from the command line (to run the migration in reverse and re-start desktop with the old version). You can do this with
ipfs-update install v0.4.23 --allow-downgrade. Instructions http://docs.ipfs.io.ipns.localhost:8080/guides/guides/install/#installing-with-ipfs-update