Weird error message upon importing a child record

> Cannot add or update a child row: a foreign key constraint fails (`apps90094_dol123`.`llxtr_socpeople`, CONSTRAINT `fk_socpeople_fk_soc` FOREIGN KEY (`fk_soc`) REFERENCES `llxtr_societe` (`rowid`))

In particular, I can’t see any difference between this line and the other 1010 lines trying to be imported