Resolution
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Follow the instructions to [create a customer gateway](https://docs.aws.amazon.com/vpn/latest/s2svpn/SetUpVPNConnections.html#vpn-create-cgw) with the new public IP address assigned to your customer gateway. Then, follow the instructions to [change the customer gateway for a Site-to-Site VPN connection](https://docs.aws.amazon.com/vpn/latest/s2svpn/change-vpn-cgw.html).

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