Fixing Missing 'custom_unique_id' in Sales Invoice
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Server Error
AttributeError: 'SalesInvoice' object has no attribute 'custom_unique_id' Possible source of error: zatca_erpgulf.(app)
Solution-
This error occurs when submitting custom XML and QR codes for offline POS systems, where a unique identifier is mandatory. If the sales invoice does not contain this required field, the system will trigger this error. Offline POS setups typically involve multiple machines, and each ZATCA POS machine must maintain its unique identifier field to ensure compliance.