Hi @Alyksandrei,
I didn’t realize you had this post too. There isn’t a way to merge, but you can always close an account you do not want by logging into it and clicking on “close account” from this page: https://www.odrive.com/account/profile
You can then try to link the second dropbox account to your 1st odrive account. Take a look at this post for some helpful tips on linking more than one storage account type: How do I link multiple accounts of the same type? (You already have that account linked.)