Upgrading KLM Flights from Premium Economy to Business with Virgin Points

[BAedi]

Does anyone know if you can upgrade a KLM flight booked as a cash ticket in PE to J using Virgin Points, if so, would I need to call to book it?

Thanks in advance.

[memesweeper]

Upgrading with points is exclusively for flying blue members https://www.flyingblue.us/en/earn-spend/flights/upgrades

[BAedi]

Thanks