Paymant for PostgreSQL 11 database instances

Hi We received e-mail from Amazon Web Services, Inc. Subject: [Reminder][Action Required] Amazon RDS Extended Support opt-in behavior is changing. Upgrade your Amazon RDS for PostgreSQL 11 database instances before March 31, 2024 to avoid potential increase in charges [AWS Account: 863567994156] [US-EAST-2]

I would like to clarify with you what Amazon RDS for PostgreSQL 11 database instances you mean? I didn't find any relevant Amazon RDS for PostgreSQL 11 database instances at my AWS account. Maybe you meant RDS instances watercolor-prod-aurora and watercolor-stage-aurora ?

Please clarify Reference: https://health.aws.amazon.com/health/home?region=us-east-1#/event-log?eventID=arn:aws:health:us-east-2::event/BILLING/AWS_BILLING_NOTIFICATION/AWS_BILLING_NOTIFICATION_31e9be94a975a65f345bbba39c5155929612b96cac2181a8adaf973fe889cc4c&eventTab=details