Hello @Katja, it’s possible to add new date ranges to an existing import after it has finished:
The link at the bottom, “Re-import date range” will allow you to add a new range of dates.
If the import status no longer exists, however (because you removed it), then it’s still possible but only if you’re able to execute some SQL to add the import status back.
Can you let me know if either of these solutions might work for you?