If you posted a payment in the payment journal and found it did not have a Bank Payment Type. It will posts without creating a Check Ledger Entry.
To correct the issue you will need to un-apply the payment from the invoice.
Go to the Vendor and the Vendor Ledger entry.
Locate the payment you need to un-apply. Select the entry then click actions, unapply entries.
It will show you the entries and click Unapply. Click Yes. Click Ok
Then, in the vendor ledger entries select the Payment entry and Reverse Transaction.
It will show you the entries that will be reversed and click Reverse.
Now, go to the payment journal and bring the invoice into pay just and enter the Bank Payment Type.