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Update a Customer Error: Bank account muss ausgefüllt werden

It´s included in the request, no idea, why I receive this error:

post invoicepayment_methodbank_account
11 months ago by Ulrike Saal
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b2gbank_accountchangelogcontactfaceget invoiceinvoice_lines_attributesissuedsimplifiedinvoicesjsonopenapipayment_methodpeppolpost invoicepost tax_reporttax report errorstaxes_attributesticketsv2025-10-13verifactu