Merging of collections [solved]

Hello everyone,
long time ago I created two Numista accounts to separate two different collections. Now it is possible to manage several collections under the same account. So I ask myself, if there is a possibility to merge my both collections into one account. I see, it is possible to export a collection as a XLSX file or something. But how to import it to an another account?

Thank you!

Hello,
Please send me the details (both account names, name of the collection if you want to set a different collection) via personal message and I'll make the transfer.