This started happening because the pages do not refresh the object when you delete a record. So, I selected a record from the object that was already deleted.
Now, when I go to the Usage => Imports/Exports => Imports ...I get this error message.

I am using a custom template copied from the SQH template, but this template worked before I clicked on the deleted record.
And I have already checked the "Sequence Number Definition" and the "Sequence Number Values".




I'm importing values for the Sales Quote.


And here is the structure with data.

And here is the template structure.

