Amazon EC2 now supports aliases for Amazon Machine Images (AMIs)
Amazon Elastic Compute Cloud (EC2) now supports the use of custom identifiers to reference Amazon Machine Images (AMIs) during instance launch. You can create these identifiers using AWS Systems Manager Parameter Store and use them to reference your AMI during instance launch, reducing likelihood of instance misconfiguration and simplifying maintenance of your automation. Code that references these parameters no longer needs to be modified every time a new version of an AMI is created.
Source:: Amazon AWS