Hi Jorge,
The field 827 "Credit Card No." in table 81 is a new standard field implemented with R2 version of NAV 2009 introducing credit card handling. As you´ve lost the fields during Import of SEPA update fob files, could you please verify that this SEPA update is for "NAV 2009 R2" and not e.g. "NAV 2009"?
In "NAV 2009" those fields are not included in standard and if you replace the tables by fob import you´ll lose the fields so maybe you lost them cause of version mismatch?
Best regards