Project Invoice number is generated with a P_ prefix rather than assigned number sequence format

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We discovered that a number of project invoices were assigned a /strange/ invoice number all staring with a P_ and followed with a /random/ 4 or 5 digit number. I have read somewhere that this is a system generated number due to an error condition during the invoice creation process but can't find the details anymore. Anyone know what this condition is that causes these numbers to be created?

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Haig Liu Microsoft Employee on at

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Project Invoice number is generated with a P_ prefix rather than assigned number sequence format

Hi,

As far as I know regarding auto-numbering there are three ways to customize it:

1.Change in environment settings.

https://carldesouza.com/changing-autonumber-prefixes-in-dynamics-365/

2.The Number Sequences in D365 Finance and Operations.

https://dynamics-tips.com/number-sequences-explained-d365-finance-and-operations/

3.Use the Auto Number Manager tool for XrmToolBox.

https://jonasr.app/anm/

I'm not sure which method you're using, but if the P_ prefix has nothing to do with your customization,

based on a database-related document I found, this error could be caused by duplicate numbering.

Databases use the P_ prefix to avoid duplicate numbering.

If this is not the cause of the issue, I suggest you raise a support ticket to request help from the developers:

https://admin.powerplatform.microsoft.com/support

If my answer was helpful, please click Like, and if it solved your problem, please mark it as verified to help other community members find more.
Please feel free to contact me if you have any further questions.
Regards,
Haig

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