我目前通过Anaconda Continuum安装了Python 3.5.2。我正在尝试升级到Python 3.6，但是在尝试运行时出现以下错误conda install python=3.6：

UnsatisfiableError:
The following specifications were found to be in conflict:
- enum34 -> python 2.6*|2.7*|3.3*|3.5*
- python ==3.6.0
Use "conda info " to see the dependencies for each package.

是什么原因造成的？