سلام یک دیتابیس دارم می خواهم داخل sqlserver 2014 اتچ کنم اما خطا زیر نمایش می دهد

ADDITIONAL INFORMATION:

An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)

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Database 'MvcShopDb' cannot be upgraded because it is read-only, has read-only files or the user does not have permissions to modify some of the files. Make the database or files writeable, and rerun recovery.
Could not open new database 'MvcShopDb'. CREATE DATABASE is aborted. (Microsoft SQL Server, Error: 3415)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&ProdVer=12.00.6024&EvtSrc=MSSQLServer&EvtID=3415&LinkId=20476

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