# Duplicate sales invoice numbers created

**URL:** <https://forum.manager.io/t/duplicate-sales-invoice-numbers-created/3605>\
**Category:** Uncategorized\
**Created:** [August 21, 2015, 5:22am UTC](https://forum.manager.io/t/duplicate-sales-invoice-numbers-created/3605 "2015-08-21T05:22:16Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![lubos](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.manager.io/lubos/32/62798_2.png) [@lubos](https://forum.manager.io/u/lubos)\
**Post date:** [April 14, 2016, 12:55pm UTC](https://forum.manager.io/t/duplicate-sales-invoice-numbers-created/3605/5 "2016-04-14T12:55:09Z")

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This issue has been fixed.

> [@\[16.3.73\] Reference number is now generated when document is saved](https://forum.manager.io/t/16-3-73-reference-number-is-now-generated-when-document-is-saved/5378):
>
> In previous versions, when you clicked New Sales Invoice button, the invoice number was assigned to sales invoice before it was actually saved. [image] This wasn’t a problem in desktop edition because only one invoice could be created at the same time. However in cloud edition or server edition, multiple users could be creating new invoices at the same time. This could make system incorrectly assign the same invoice number to multiple users which means the business could end up with multiple i…

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