Database diagram support objects cannot be installed because this database does not have a valid owner. To continue, first use the Files page of the Database Properties dialog box or the ALTER AUTHORIZATION statement to set the database owner to a valid login, then add the database diagram support objects.

,

When I right click on the database diagrams folder in SSMS to create new diagram. Following popup window open with error.


Solutions:
From the Message you can clearly see that the database does not have a valid user. We can have a valid user by running a query or through SSMS.
Query:
ALTER AUTHORIZATION ON DATABASE::TestDB TO sa
GO

Change Database name to your database in query.

SSMS:
Go to properties of a Database by right clicking the Database and then select File.
Change the owner by clicking the dotted button in highlighted part in the image below.


Original post (opens in new tab)

Rate

Share

Share

Rate