The error "Multiple lines input for one to one association: benefitInsurancePlanEnrollmentDetails" appears when performing BenefitEnrollment import.
SuccessFactors Employee Central: Global Benefits
#number (for example, #1, #2, etc.) are used for auto-number fields like external code in the import file. There are files like BenefitEnrollment.csv, BenefitEnrollment-Insurance Plan Details.csv, BenefitEnrollment-Pension Dependent Nominees.csv, Insurance Plan Enrollment Details-Enrolling For Dependent.csv, etc. where this format is used. Verify that in all the files same number (for example #1) is used for the same field and same user. A mismatch in the value will cause the error.
Insurance, import, auto, number, #,
|Multiple lines input for one to one association: benefitInsurancePlanEnrollmentDetails|