can Iconfigure Oracle Project Billingdeduction line on a billing event accepts only negative values

Summary:

Restrict deduction events to negative amounts in Oracle Fusion Project Billing

Question: In Oracle Fusion Project Portfolio Management (Project Billing), we create billing events for deductions against contract lines. We need the Amount in Bill Transaction Currency to be negative only for these events, and ideally to default to a negative value. Is there a standard setup for this, for example through the event type configuration? If not, what is the recommended approach, such as an Application Composer validation or handling the sign in an integration?

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