Downgrade 6.5 -> 6.0

I downgraded my esxi host from 6.5 to 6.0, and now i can't see the files from the datastore.  I was able to mount the datastore, but i think it created a new VMFS instead of mapping the one that was already there.  How can i map the old VMFS so that i can create a new VM using the VM disk that was running on ESXi 6.5?

ESXi Newb.

Thanks