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Naphtali Davies February 2016

Upgrade TFS 2010 to 2015 FOREIGN KEY constraint error

I'm trying to upgrade from TFS 2010 to TFS 2015.

Before the actual upgrade I want to do a test upgrade, meaning leave the 2010 alive.

I backed up the databases and restored them on a new sever. Then I run the TFS upgrade.

When it finishes I get the following error:

Could not drop object 'Constants' because it is referenced by a FOREIGN KEY constraint.


chief7 February 2016

You will likely need to contact Microsoft for support on this. We recently upgraded from 2010 to 2015 but didn't have this issue. I suspect someone customized your TFS instance and it is conflicting with the migration script.

If you use CodedUI tests this post may help.

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Asked in February 2016
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