Invoices, subscriptions, payments are have all a generated key like 8X6XWKJ024214K
But it's not saved to database.

As it's not in database it's generated on the fly each time it's needed.
Because of that we can't do anything with this generated key.
- Google analytics conversion
- Paypal / Stripe cross analytics
- Search a subscription from any key (invoice_key, payment_key, subscription_key)
- Custom analytics

We need to be able to do real custom reports and because of that a lot of things are nearly impossible to do.

Please let us know if there is any way to get rid of this restriction.
If not please consider adding this key to the database.

Best regards