This server supports both version 661 and earlier. The downgrade path is not supported ., 661 downgrade

This server supports both version 661 and earlier. The downgrade path is not supported ., 661 downgrade
This server supports both version 661 and earlier. The downgrade path is not supported.
Environment: SQL Server 2008 R2. problem: the error "this Server supports version 661 and earlier. The downgrade path is not supported ." Solution: this problem is generally caused by different database versions. Query the database version Syntax:

use masterselect @@VERSION

• 661 is the version of sql2008 R2 -- Microsoft SQL Server 2008 R2 (RTM)-10.50.1600.1 (Intel X86) Apr 2 2010 15:53:02 Copyright (c) Microsoft
• Microsoft SQL Server 655 (sp1)-10.0.2531.0 (Intel X86) Mar 29 2008 10:27:29 Copyright (c) 2009-1988

The SQL server database version is 661 and cannot be opened. This server only supports version 655 and earlier and does not support the downgrade path.

Assume that your database file is SQL2008R2. Your local database is SQL2008 or other databases earlier than SQL2008R2. replace your local database software with SQL2008R2. Windows 7 can be installed without changing the system. I also encountered this problem a few days ago. I can change the R2 database.

The SQL server database version is 661 and cannot be opened. This server only supports version 655 and earlier and does not support the downgrade path.

The database version 661 cannot be enabled. This server supports both version 655 and earlier. The downgrade path is not supported.

Your current database version may be Microsoft SQL Server 2008 (SP1)

You need to uninstall SQL Server 2008 (SP1) and then reinstall Microsoft SQL Server 2008 R2 (RTM)

Then you can handle it properly.