SAP Message 5D871 - According to infotype 0118, record was limited for &1

Diagnosis
The child allowance for the entered time period cannot be clearlyfixed. This is probably because, during the entered period the childallowance for one child has run out, or another child has been added.

System Response
The end date is automatically set to the end of the first fixed timeperiod.

Procedure
If necessary, create additional records for the other time periods.