can't update dataflow with my current licence

i need to create a dataflow with a merge between two tables in it, i have a PPU valutation version ( )

currently active on my account but apparently i can't update my dataflow

it says (Dataflows are disabled, this dataflows contains calculated tables that need the premium capacity for the update. To activate the update of data, update this work area to premium capacity).

can i just buy a PPU complete licence or do i need the premium capacity one?