Import Wizard doesn't work for Journal Entries

How can I import a .csv file with Journal Entry with the import wizard?
The Template generates only one account but when importing it I get the error message the credit and debit need to be the same. That however requires two different account - one for debit and one for credit.
I tried to enter two identical rows with only different accounts an one row has debit the other credit but the import wizard doesn’t recognize the two rows as debit and credit entry.