SAP Message 5F090 - Contract type not identified between &1 and &2 (conf.table T5F42)

Diagnosis
The employee's contract type is not included in table T5F42.
If the employee holds several contracts during the period in question,then the parameters of at least one of these contracts has not been setin this table.

System Response
The system interrupts the contract processing.

Procedure
Set table T5F42 parameters so as to complete your employee contracttypes and contract properties.