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If you create an external library and then run DBCC CHECKDB in Microsoft SQL Server 2019, database corruption occurs, and the following error message is generated:

Msg 8992, Level 16, State 1, Server <ServerName>, Line <LineNumber>

Check Catalog Msg 3851, State 1: An invalid row (class=128,depid==<DepId>,depsubid=0) was found in the system table sys.syssingleobjrefs (class=128).

CHECKDB found 0 allocation errors and 2 consistency errors not associated with any single object.

CHECKDB found 0 allocation errors and 2 consistency errors in database 'master'.


Cumulative update information

This problem is fixed in the following cumulative update for SQL Server:

Cumulative Update 15 for SQL Server 2019

Each new cumulative update for SQL Server contains all the hotfixes and security fixes that were in the previous build. We recommend that you install the latest build for your version of SQL Server:

Latest cumulative update for SQL Server 2019


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Learn about the terminology that Microsoft uses to describe software updates.

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