Unable to refresh device

Hi I am unable to refresh device.
after tcpdump I found following error
MongoError: Updating the path ‘_tags’ would create a conflict at ‘_tags’
I am unsure why this error is happening?

Do you have any provision scripts that might be causing issues? First I would try disabling your provision scripts and presets one by one and try repeating the process until you narrow down the culprit.

thanks for the reply. yes, there is provision scripts. I will try as you suggested.