When attempting to upgrade licenses in the Broadcom Support Portal from 8.x to 9.x it fails with the following error:
VMware Cloud Foundation 9.0
There is no license key upgrade path for 9.x licenses in the Broadcom Portal. This is managed through a license file in the business console once VCF Operations is deployed.
Take a look at KB: License Key Management for VMware Products and KB: Unable to license vCenter after upgrading to 9.0 for licensing procedures/processes for 9.x.