Informational (4)
Recommended Mitigation
It is recommended to initiate engine version upgrades by modifying the cluster and specifying a new engine version. For more information: <a href="https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/VersionManagement.html" target="_blank" rel="noopener noreferrer">https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/VersionManagement.html</a>