[ Subject of the issue ]

Description

Describe your issue in as much detail as possible here. We are currently live on 0.6.3, which as I understand it from Polygon's website will still be supported. If I just change the polygon-edge file in /usr/local/bin to v0.8, then I get a multitude of errors. Anything from bulk sync to non-validators...

I wrote a quick test genesis.json and dropped that in, and v0.8 works fine, makes blocks with zero errors, so the environment is all good.

Your environment

OS and version. Ubuntu 20.04
The version of the Polygon Edge. 0.63 to 0.8 (Confirm the version of your Polygon edge client by running the following command: polygon-edge version --grpc-address GRPC_ADDRESS)
The branch that causes this issue.
Locally or Cloud hosted (which provider). local for the 0.8 test, but normally on AWS cloud
Please confirm if the validators are running under containerized environment (K8s, Docker, etc.). no

Steps to reproduce

Tell us how to reproduce this issue. Install v0.8 polygon-edge to /usr/local/bin/ and then try and make blocks on a previously running 0.6.3 polygon-edge.
Where the issue is, if you know.
Which commands triggered the issue, if any.
Provide us with the content of your genesis file.
Provide us with commands that you used to start your validators.
Provide us with the peer list of each of your validators by running the following command: polygon-edge peers list --grpc-address GRPC_ADDRESS.
Is the chain producing blocks and serving customers atm?

Expected behavior

Tell us what should happen. It all runs with no issues.
Tell us what happened instead. It just throws errors.

Logs

Provide us with debug logs from all of your validators by setting logging to debug output with: server --log-level debug

Proposed solution

If you have an idea on how to fix this issue, please write it down here, so we can begin discussing it. A migration guide would be epic!!, Thanks, Nex

0xPolygon / polygon-edge

How to migrate from 0.6.3 to 0.8? #1334