Asp.NET/ MSSQL Database Hosting Expert

I have an ASP.NET website and now I need to move it to a different hosting because my developer has started giving me issues. I tried to do it myself but it keeps crashing so I need an ASP.NET Expert for this. Website is [login to view URL] and we are trying to rehost it at [login to view URL] ITS DATABASE IS IN MSSQL. EVERYTIME I TRY TO UPDATE THE DATABASE USING SQL MANAGEMENT STUDIO IT GIVES ME AN ERROR. We have an application using which we update our database but attached is the screenshot of error we are getting. You can check all the product details have color so I am not sure what seems to be the problem