Why is Apple forcing us to pay twice?

Why am I forced to pay another $200 for new software with the latest Sierra? Totally abusive!!! Apple please respond. There is no reason we can't use software we already paid $200 for. Is this an emerging pattern to force people to pay twice.

For those who don't understand. I purchase Apple Logic Pro Software a few years ago at $200. When I updated to the latest version of Sierra the system does not allow me to use the software I purchase. I directs me to purchase a new copy at the Apple Store. This is going too far!!!