We tried upgrading the server today, but unfortunately it looks like 1.17 is still not ready for deployment. Namely, we had issues with the Shopkeepers plugin, which is essential to our in-game economy. This process caused the server to be down for about 30 minutes. Everything has been restored from our local backup. We will continue to test 1.17 offline and wait patiently until the Shopkeepers plugin updates. More to follow.