LWRP Migration - Missing grass

Hi everyone,

I recently started learning game development with Unity. Today I decided to migrate to one of the new pipelines to measure the difference in performance and everything except the grass got properly migrated. The grass is invisible, if you uncheck "billboard" it will look like the attached screenshot. If I create a new terrain, I am able to pain grass just fine. Can I fix the grass on my old terrain or I should wait for my next project in order to try LWRP /HDRP?