Field help (VEP1LOCK) 

The payslip cannot be modified once it has been printed or posted or once the next payslip has been created. You may need to freeze a payslip calculated before these successive steps.

To freeze a payslip, use the Lock/unlock function from the Actions panel. The Locked check box is automatically selected, and the user name and date are automatically displayed.

To release a payslip, use the Lock/unlock function from the Actions panel. The Locked check box is cleared automatically. The user name and date remain displayed for information purposes.

A locked payslip cannot be modified and is not taken into account in the mass update functions.