Hi @Dem Do you have these two values under one embedded data or you want to merge two separate embedded data fields into one? 
You can try updating embedded data manually directly in the directory. Please refer this support page.

Hi @omkarkewat 
I want to merge two separate embedded data fields into one.

Hi @Dem One way is you can delete all the affected contacts and then reupload them with a single merged field (which you will have to modify in the excel outside Qualtrics).
Next is if you have already recorded responses with these affected duplicate fields you can combine the data fields using this feature in the data analysis tab.

Hello @Dem Dem! Could you confirm if the solution provided was effective? If so, it would be valuable for the Community! Otherwise, we can continue to explore other alternatives.