Hi! It looks like I can integrate either Zoho Subscriptions, or Zoho Invoices with CRM, but if I try both I get an error.

For example, I integreate Zoho Subscriptions OK, but then I try to add Invoices (from Invoices web app settings), and get error "Integration is currently enabled with the 'Zoho Books' organization... Please disable this integration and try again."

So is it not possible to have them both integrated?

Are the two invoice systems considered SO SIMILAR that there is no need to have them both?