Can't delete static IP on Lightsail

Hi,

Please contact AWS Support under the free support plan to get the rDNS record reset after which you will be able to release the static IP.

Refer - https://docs.aws.amazon.com/lightsail/latest/userguide/amazon-lightsail-configuring-reverse-dns.html

If you later want to delete the static IP address from your Lightsail account, you must submit a request to AWS Support to remove the reverse DNS configuration. After the reverse DNS configuration is removed, you can delete the static IP address from your Lightsail account

Thanks.