title: The database cannot be opened because it is version 839. This server supports version 782 and earlier. A downgrade path is not supported
body: <p>I made a C# project that contains a local database (Microsoft SQL Database Server) (mdf) in my pc that works totally fine. but whenever i use my laptop to run it, it gives me this error: </p>
  
  <p><strong>The database 'C:(the path)\CALENDER.MDF' cannot be opened because it is version 839. This server supports version 782 and earlier. A downgrade path is not supported.</strong></p>
  
  <p>this error appears every time i try to refresh server explorer. i need it to work in my laptop because i use it to make a class presentation.</p>
  
  <p><a href="https://i.stack.imgur.com/uSoV4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uSoV4.png" alt="enter image description here"></a></p>