How can I resolve this error in Microsoft SQL Server Management Studio

Question

I have created a database online clinic management system having 10 tables. Now I want to create a database diagram for this database but I'm getting the following error. Please share your knowledge to resolve this error.Thank you.

TITLE: Microsoft SQL Server Management Studio

Could not obtain information about Windows NT group/user 'HAIER-PC\\92347', error code 0x534. (Microsoft SQL Server, Error: 15404)

Answer 1

I have found the solution. Just go to databases. Select your database.Go to Properties. Open Files and modify owner to [sa].Its working .

Answer 2

just run this query :

USE yourdatabasename
GO
EXEC sp_changedbowner 'sa'

change yourdatabasename to database name you have!