AWS is retiring v2 of the SDK, which we have used for 10+ years. We need to migrate all of our AWS SDK code to v3, which affects most of our code repos.
They do have a toolkit that is supposed to help with the migration, available here:
But this is one we need to do in Q4 at the latest. We've known about it for a while but keep pushing it off. I'd say it's a 13 point task across all of our repos.