Field help (BPCPITDEB) 

You can enter a point debit rule directly for a customer.
The debit indicated in the customer record is applied only for the contractual debit. All additional debits are specified at the level of the point debit rule.
Click the Actions icon and Point debit to view or define a Point debit rule.
The entry of a value in this field leads to the creation of a point debit rule where only the customer component is entered.