Private IP address change, effect(s)?

Hello,

When EC2 instances are launched, the primary elastic network interface is assigned a reserved private IP address from the default VPC DHCP pool. The private IP address stays assigned to the network interface until it is deleted. The instance's primary network interface cannot be removed; it stays assigned to the instance until the instance is deleted. It is not possible to remove or change the private IP address of the primary network interface, but it is possible to add more private IP addresses to the network interface.

Note: You can manually assign a static private IP address for your Windows network adapter, but if the network interface IP address and Windows adapter’s IP addresses don’t match, the network connection will not work. 

https://aws.amazon.com/premiumsupport/knowledge-center/static-private-ip-windows/
https://aws.amazon.com/premiumsupport/knowledge-center/custom-private-primary-address-ec2/

Thank you.