UPDATE `SHIFT` SET `OJB_CONCRETE_CLASS` = 'net.sourceforge.fenixedu.domain.ActualShift' WHERE `OJB_CONCRETE_CLASS` IS NULL;
UPDATE `SHIFT_PROFESSORSHIP` SET `OJB_CONCRETE_CLASS` = 'net.sourceforge.fenixedu.domain.ActualShiftProfessorship' WHERE `OJB_CONCRETE_CLASS` IS NULL;
UPDATE `SCHOOL_CLASS` SET `OJB_CONCRETE_CLASS` = 'net.sourceforge.fenixedu.domain.ActualSchoolClass' WHERE `OJB_CONCRETE_CLASS` IS NULL;