OFX FITID not unique
While generating OFX export for boobank (for Credit Cooperatif Professional in France), it was observed that many transactions had the same date, amount and label (for instance related to taxes for wire transfer for incomes) leading to many transactions with the same FITID (while it is supposed to be unique).
An easy fix would be to instantiate the seen dictionary and to provide it as a parameter to the unique_id() function called to make a unique FITID (this dictionary was made for that purpose IMO).