When Adding the license key in Aria Operations under Subscription-> License Management you see below error.
Error: The following license keys are not valid, expired or already exist and must be removed from your input before you can continue:
Aria Operations 8.18.x
license key used is not a VCF license
All legacy license keys for Aria Operations or Aria Suite will not be accepted under Subscription-> License Management page.
Please input these under Subscription ->Legacy Licenses page. These will still work there.