Custom products created after 01 January 2020 cannot be attached to client on Red Hat Satellite 6.

Issue

• Custom product subscription is not visible in client
• Even though subscription valid, client complain about expired subscription for custom product.

*** WARNING ***
The subscription for following product(s) has expired:
  - XXXXX Custom Packages
You no longer have access to the repositories that provide these products.  It is important that you apply an active subscription in order to resume access to security and other critical updates. If you don't have other active subscriptions, you can renew the expired subscription.

• Client can not consume custom product subscription which are created after 01-Jan-2020