De-duplicate process

Hi everyone,

Classic process:

Step 1) send vendors from R3 to MDM

Step 2) In MDM we have found the same vendor twice and we merge them to one

Step 3) We syndicate them to R3

But still there are 2 records for the same vendor in R3 and the question is how to deal with them? Which one will be updated and what about the second one, how to get rid of it in R3?

Thank you.