hi community,

we try to import a nintex WF 2013 Config Database to SP2016 Farm and get error "unexpected SQL Error" in Nintex Admin Page in SP2016 CA.

the cause we found in SharePoint uls log:

Failed to update databases.: System.Data.SqlClient.SqlException (0x80131904):  The CREATE UNIQUE INDEX statement terminated because a duplicate key was found for object name "dbo.StringFunction" and index name "IX_FunctionAliasUnique". The double key value is (FN-Abs).The CREATE UNIQUE INDEX statement terminated because a duplicate key was found for object name "dbo.StringFunction" and index name "IX_FunctionAliasUnique". The double key value is (FN-Abs).

 Any Help is welcome.