That option ignores also other errors, obviously. If not selected:
INSERT INTO `test`.`tezaver_place_date` (`term_original`, `cc2`, `place_id`, `micro_location`, `date_observation`, `id_member`, `src`) VALUES ('Acer campestre', 'foo', '22416', 'foo', '17.6.2007', 'foo', 'foo');
/* SQL Error (1364): Field 'id_tezaver' doesn't have a default value */
and it breaks import.
If selected: It imports with no problem, because id_tezaver is filled by before insert trigger.
Should be then changet to INSERT IGNORE (all errors), maybe.