SAP Message 5V135 - Checkbox P0505-SHPSI can only be marked if an amount for hol. pay exists

Diagnosis
You have marked the checkbox Submitted SI contr. (P0505-SHPSI).This indicates that the single leave holiday pay (early and balance)has been submitted to the social insurance contributions when they havebeen initially paid. This can only be done if there is a value storedfor Single holiday pay (P0505-SINHP).