An internal document cannot be matched; the payment must be processed through a mutual offset.
Example: I have a received invoice for the purchase of a car, which was partially paid in cash, and 150 thousand was paid from a long-term loan. Using an internal document, I transferred 150 thousand to long-term liabilities (321/479), so account 321 has a zero balance. However, in the invoice ledger, the invoice remains only partially paid.
1) We create a manual offset with a movement type of outgoing payment (this movement will complete the payment of the invoice and match it).
2) We create a manual offset with a movement type of incoming payment (this movement will settle the bridging account).