Phoenix 5

The previous chain version had encountered a crash, which you can reproduce by following these instructions. Thanks to Parity's team, we were able to identify that the issue lies in the state of the Authorship pallet which wasn't properly cleaned by the forking script.

This forks the previous state and restarts a chain from it. It also includes a runtime migration to adjust vesting grants' unlock block numbers since we are restarting from the block 0.