On Wednesday, October 19th at 13:00 UTC the Cardano Pre-production environment will undergo an update that will correct the configuration on the validity period for the KES keys to match mainnet configuration (62 KES periods of 1.5 days).
Note: If you would like to understand more about the KES period and how it works please review the following article in the Cardano developers guide here
The Preproduction environment will be offline for around 48 hours while technical teams apply the update and complete all checks. The team will provide updates in our Telegram and Discord channels once the update is successfully completed.
We recommend shutting down all Cardano components on the Pre-production prior to the update and throughout this maintenance window.
SPO’s (Stake Pool Operators) should also shut down their stake pools and rotate their keys once the network is back online to allow relays to reconnect to their stakepool.
Note: If you require more information on KES key rotation please view the following article here
Daedalus Pre-production environment
Users running Daedulas in the Pre-production environment should disconnect and shut down Deadalus during this maintenance window.
If you have any questions please feel free to reach out via the usual support channels or you can open a support ticket here