Understanding Error on Create Migration

Following a tutorial, but its VS2015 not 2017, so I have to work around a few things.  I suspect I mucked up.

adding migration via C prompt is generating errors:

C:\Program Files\dotnet\sdk\1.0.4\Microsoft.Common.CurrentVersion.targets(1964,5): warning MSB3277: Found conflicts between different versions of the same dependent assembly that could not be resolved.  These reference conflicts are listed in the build log when log verbosity is set to detailed. [D:\AccessUpdateForEVA\BethanysPieShop\BethanysPieShop\BethanysPieShop.csproj]
    1 Warning(s)
    0 Error(s)

Time Elapsed 00:00:06.88
An error occurred while calling method 'ConfigureServices' on startup class 'Startup'. Consider using IDbContextFactory to override the initialization of the DbContext at design-time. Error: Could not load file or assembly 'Microsoft.Extensions.Caching.Memory, Version=1.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Not sure where to look or what to look for to check it.  I thought it was something to do with the version 1.1.1.0 however I cant find a reference to this version anywhere in the project.

Where should I look for a solution?