无法创建文件，因为它已存在。更改文件路径或文件名，然后重试该操作

I created an asp.net mvc website with a code first database. I enabled database migration through the PM Console. I uploaded the website and database on to a server for online testing. I now want to do additional testing on my desktop so I downloaded the existing databases and placed them in the I created an asp.net mvc website with a code fi