Maximum number of Elastic IPs has been reached.

Hello,

You can get more Elastic IP on request. You can then attach/reattach them for your EC2 instances.

If you feel your architecture warrants additional Elastic IP addresses, complete the Amazon EC2 Elastic IP Address Request Form[1]. Describe your use case so that we can understand your need for additional addresses.

Refer to Elastic IP Address Limit Section in the link below:
[1] https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/elastic-ip-addresses-eip.html#using-instance-addressing-limit

Write back to us if you have any further queries.