Cloudformation issues encountered

The event source and function provided mapping already exists. Please update or delete the existing mapping with UUID

  • Add an event source filter pattern failed when lambda already has dbstream event source defined.
  • The issue is that changes to the property¬†requires replacement, but due to how CloudFormation handles changes that require replacement (typically by first creating the new resource and then deleting the old one), it’ll try to create two event source mappings from the same resource, which Lambda doesn’t allow.
  • last reported issue was on 10/2023 so not sure if it is fixed