Validator 9 - special case

**VM name:** [ubuntu@172.31.48.48](mailto:ubuntu@172.31.48.48)

- [ ] Set the node version 8.x up for Stagenet, enable debug logs.
- [ ] Setup Prometheus with `CONCORDIUM_NODE_PROMETHEUS_LISTEN_PORT=9090` and also I think `CONCORDIUM_NODE_PROMETHEUS_LISTEN_ADDRESS=0.0.0.0`
- [ ] Start the node and start to catch up
- [ ] Make sure that the node is still catching up while PU is going to be in effect
- [ ] **WAIT FOR PROTOCOL UPDATE**
- [ ] After protocol update verify:
- [ ] Node is still catching up
- [ ] No errors in the logs

Use the listed VM and configure the node for Stagenet with debug logging and the two Prometheus environment variables. Start the node, observe catch-up through the protocol update, and review its logs afterward. Done means the node remains catching up and no errors appear after the update.

Written by the indexing model from the issue text.