Hi @SysAdmin ,
please take a look here regarding the move of a Public IP address: Dependent resources
Dependent resources
When you move a resource, you must also move its dependent networking resources. However, you can't move across subscriptions any resource associated with a Standard SKU public IP address. To move a virtual machine with a network interface card to a new subscription, you must move all dependent resources. Move the virtual network for the network interface card, and all other network interface cards for the virtual network. If a virtual machine is associated with a Standard SKU public IP address, disassociate the public IP address before moving across subscriptions.
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Regards
Andreas Baumgarten