Field help (PPH2CTR) 

This field indicates the activity start date initialized at the end date of the slip application. By default, it corresponds to the last active activity period.

SEEINFO When creating, modifying and deleting an activity period in the "Contract" function, a warning message appears to inform the user of the update of the activity periods.
Message appearance conditions: events occurring after the new activity period start date exist and the user has chosen to display the activity periods (Input, Output) in at least one time entry transaction.