This is a bug in the Mosaic Provider Portal interface that was fixed in interface version 22.2.0.
Older versions of the interface were sending a Unique Line Reference when they didn't need to. Occasionally this would clash with a Mosaic Provider Portal generated number and cause the error above.
To resolve this, you'll need the latest version of the interface installed. To book this, please raise a new case online and reference the title of this article.
Error: 'The Unique line reference is currently being used on another order'
In this article, we explain why service orders may fail to save in Mosaic due to duplicate unique line references on other orders.
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Written by Yusef Abulaynain
Updated over 4 months ago