In the variables definition "uniqueid,Unique identifier for each interviewee" so why is the same id is found in different countries? Is it unique in each country?
yes, we may find the same Uid in different countries but it is unique in each country.
I think that You should create an ID field before you start preprocessing, 'country'+'x'+'uniqueID'
Ah yes as in the submission file, the definition is a bit misleading, thank you.