AWS Systems Manager Distributor now enables in-place updates to keep your software packages installed during the update process. With this feature, you can avoid uninstalling your software during the update process, enhancing your security posture and availability.

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/11/aws-systems-manager-distributor-enables-in-place-update-of-software-packages/