I'm trying to close the point of sale session and I'm not getting it, it's generating the error below:

A operação não pode ser concluída, provavelmente devido aos seguintes fatores:
- exclusão: você pode estar tentando excluir um registro enquanto outros registros ainda fazem referência a ele
- criação/atualização: um campo obrigatório não está configurado corretamente

[objeto com referência: payment_method_id - payment.method.id]

2019-04-25 17:24:23,630 1411 ERROR acai_iate odoo.sql_db: bad query: b'INSERT INTO "account_payment" ("id", "partner_type", "payment_difference_handling", "state", "move_name", "writeoff_label", "communication", "name", "amount", "partner_id", "journal_id", "payment_date", "payment_method_id", "currency_id", "payment_type", "create_uid", "write_uid", "create_date", "write_date") VALUES(nextval(\'account_payment_id_seq\'), \'customer\', \'open\', \'reconciled\', NULL, \'Write-Off\', \'Caixa 1/0023: \', \'POS/2019/04/24/03\', \'25.00\', 14, 10, \'2019-04-24\', NULL, 7, \'inbound\', 1, 1, (now() at time zone \'UTC\'), (now() at time zone \'UTC\')) RETURNING id'

ERROR: null value in column "payment_method_id" violates not-null constraint

DETAIL:  Failing row contains (26171, null, customer, 14, 25.00, 7, 2019-04-24, Caixa 1/0023: , 10, null, POS/2019/04/24/03, reconciled, inbound, null, null, null, open, null, Write-Off, null, 1, 2019-04-25 17:24:23.539933, 1, 2019-04-25 17:24:23.539933).

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