We have a strange posted sales invoice number in our system and can't work out how this can have happened. Does anybody have any ideas on how this could have happened? I checked the no. series and all looks good.
If you have any custom extensions or integrations, they might be interfering with how invoice numbers are generated. Some customizations or external systems might inadvertently override the default behavior and cause the system to generate a GUID.
Even though you mentioned that the number series looks good, it’s worth double-checking if there was a momentary issue when the invoice was created. Business Central relies on number series for sequential numbering, and if something disrupts that, the system may generate a GUID as a fallback.
Did You import the Sales Header?
maybe during the import process something was wrong or wrong value in wrong field, and You fill in the Posting No. on the sales header with this?
Just a guess, but I cannot think of any other reasons how the number could be created as GUID.
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