Netting - External and Netting Bank Account Setup - Payments Not Posting

Hello,
We are using bi-laternal netting and have noticed that the AP paycycle is creating zero amount deposits which are not posting because the Netting account is not setup as an External Account and therefore the process is failing and process instance number is being created in the PS_PAYMENT table.  We have the Netting Account setup but does the Net account also need to be created in the external accounts for bank setup so that this process does not fail?

Thanks,
Linda