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Unsupported schema version 15 - version 14 or earlier is supported

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This article was created in response to a support issue logged with K2. The content may include typographical errors and may be revised at any time without notice. This article is not considered official documentation for K2 software and is provided "as is" with no warranties.
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Issue

When trying to deploy a package the following error occurs:

Unsupported Schema Version 15 - Version 14 or earlier is supported. Please update to the latest Version. Parameter Name: xml

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Symptoms

Please review the following KB:

http://help.k2.com/support-services/kbt136326

Should this not resolve your issue, please check if your Target Environment is running SQL Server 2008 compatible mode.

Resolution

Changing the Compatibility Mode of the K2 Database solved the issue.

Please review the following article for more information on how to view/change the Compatibility Mode:

https://docs.microsoft.com/en-us/sql/relational-databases/databases/view-or-change-the-compatibility-level-of-a-database