Upgrade Advisor has detected the 0xFFFF character in an object identifier. In SQL Server 2005 and later, objects such as ...

Upgrade Advisor has detected the 0xFFFF character in an object identifier. In SQL Server 2005 and later, objects such as databases, tables, and columns that contain this character in their identifiers cannot be referenced or renamed when the database compatibility mode is set to 90 or later. When you upgrade to SQL Server 2012, user databases maintain their compatibility mode. Before you change the database compatibility mode to 90 or later, rename the object that contains the 0xFFFF character.