Yes, it is possible. You must Downgrade the license from your management license page.
Can I downgrade my license key?
Yes, VMware Workstation 15 Pro can be downgraded to Workstation 14 Pro or Workstation 12 Pro. For information on downgrading licenses, see How to downgrade license keys in My VMware (2006975).
Please note licenses in China not purchased via VMware store cannot be downgraded.
I wasn't aware of downgrading - grazie!