Payment Status: Negotiable for manual AP/AR Netting

Hello everyone,

For manual AP/AR netting, we configured a dummy bank account charged to a clearing account (Non bank acct), where the AP and AR open transactions from the same customer and supplier will be offset through the clearing account. Is there any other way to prevent the payment status from being set to "Negotiable" for disbursements processed through this dummy bank account, since no actual bank transaction or reconciliation process is required?

Looking forward to your inputs.

Thank you