错误信息如下：
The type 'ConnectionMultiplexer' exists in both 'StackExchange.Redis.StrongName, Version=1.2.6.0, Culture=neutral, PublicKeyToken=c219ff1ca8c2ce46' and 'StackExchange.Redis, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c219ff1ca8c2ce46'
请问如何解决？