If you purchased a subscription to the extended version of Kaspersky Secure Connection while not signed in to your My Kaspersky account or when you did not have a My Kaspersky account, your subscription is considered as "anonymous". An anonymous subscription is associated with your the App Store account, but not with your My Kaspersky account. You can associate your anonymous subscription with your My Kaspersky account at any time.
After you sign up to My Kaspersky on the device with the extended version of Kaspersky Secure Connection, your subscription is automatically associated with your My Kaspersky account. After that, you can manage and restore your subscription by using My Kaspersky. All of the devices that use this subscription will be associated with your My Kaspersky account.
When you restore an anonymous subscription from Kaspersky Secure Connection while being logged to your My Kaspersky account, your subscription is automatically associated with your My Kaspersky account as well. All devices that use this subscription will be automatically connected to it.
An anonymous subscription can't be activated along with a recognized subscription and associated with your My Kaspersky account. If you sign in to your My Kaspersky account, the error message will be displayed. In that case, you should wait until the previous subscription expires or use the anonymous subscription on the other device.