[A]MySQL.Data.MySqlClient.MySqlConnection cannot be cast to [B]MySQL.Data.MySqlClient.MySqlConnection. (no replies)

I hope I am posting this in the right place - please forgive me if I am not...

I have a WinForms / .Net 4.0 application in Visual Studio 2015 Update 3.
When I try to add, or edit, a TableAdapter in any of my DataSets, I get this error:

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The wizard detected the following problems when configuring the TableAdapter:

Details:

Generated SELECT statement.
[A]MySQL.Data.MySqlClient.MySqlConnection cannot be cast to MySQL.Data.MySqlClient.MySqlConnection. Type A originates from 'MySQL.Data Version 6.9.8.0, Culture=neutral,PublicToken=c5687fc88969c44d' in context 'Default' at location 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\PrivateAssemblies\MySQL.Data.dll'. Type B originates from 'MySQL.Data, Version 6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d' in context 'Default' at location 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\MySQL.Data\v4.0_6.9.9.0_c5687fc88969c44d\MySQL.Data.dll'.
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Obviously it is complaining about two different versions of the MySQL.Data.dll 6.9.8 and 6.9.9. What I don't understand though is why or where is it referencing version 6.9.8.0? If I look at my project's references, it is using MySQL.Data.dll version 6.9.9.0. This is a NuGet package at location:

C:\Users\Fabs-LenovoY70\Source\Workspaces\Tracker\Tracker\packages\MySql.Data.6.9.9\lib\net45\MySql.Data.dll

I've search my entire solution for any references to 6.9.8 and I've found nothing. Any ideas? Thank you...