Server could not find the upgrade version for back-end. Version missing database "%1" using the connection string of %2. ...

Server could not find the upgrade version for back-end.

Version missing database "%1" using the connection string of 
%2.
Cause: The database schema and the Server were updated by different installation packages.
Resolution:
Ensure both the Server and back-end were installed or modified by the same installation package.
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