SAP Message 5V520 - Perno of applicant. filled in although corresp. red. not selected

Diagnosis
There is a value assigned to the personnel number field ASSIN(applicant personnel number) . This value should only be filled if thecorresponding reduction is selected (plan plus one, plan plus two, planplus three, plan plus one old, plan plus two old, plan plus three old).

Procedure
Clear the field ASSIN or assign the apropriate reduction in fieldDeduction SI contribution ER.