Picrust2 - reference database issue


I have biom files created using SILVA database, which I am trying to provide as input for predictive analysis using Picrust2 on the Galaxy server. My .biom files have been constructed using SILVA as the reference databases, while Picrust2 needs the OTU tables to be made using GreenGenes as the reference database - due to which none of my OTU IDs are being recognized by the Galaxy system. Can someone help me with a way around this? Is there a possibility to choose the reference database for predictive analysis using Picrust2?

Thank you,