Microsoft distributes Microsoft SQL Server 2008 or Microsoft SQL Server 2008 R2 fixes as one downloadable file. Because the fixes are cumulative, each new release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 or SQL Server 2008 R2 fix release.
After you enable change tracking in a Microsoft SQL Server 2008, in a Microsoft SQL Server 2008 R2, in a Microsoft SQL Server 2012, or in a SQL Server 2014 database, backup operations fail, and an error message that resembles the following is logged in the SQL Server error log file:
<Date><Time> <spid> Error: 2601, Severity: 14, State: 1. <Date><Time> <spid> Cannot insert duplicate key row in object 'sys.syscommittab' with unique index '<Index Name>'. <Date><Time> <spid> Error: 3999, Severity: 17, State: 1. <Date><Time> <spid> Failed to flush the commit table to disk in dbid <Database ID> due to error 2601. Check the errorlog for more information.
Additionally, you receive a 2601 error code when SQL Server 2008 tries to perform a checkpoint operation on the database.
Note For an overview of SQL Server database checkpoints, go to the following MSDN website:
Recommendation: Install the latest cumulative update for SQL Server
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. We recommend that you download and install the latest cumulative updates for SQL Server: