Hi all,

In SharePoint 2010, This is rare error, I got when I deploy and activate Feature using VS2010. Deployment works file  but in activation process it get stuct and throws error.

Error occurred in deployment step 'Activate Features': The field with Id {GUID} defined in feature {GUID} was found in the current site collection or in a subsite.

When I googled I found very good solution  from Sandeep Snahta Blog.

http://snahta.blogspot.hk/2011/10/error-in-activate-features-from-visual.html

As suggested in this blog, there is two option to overcome this error;

Close VS2010 and restart again.

Or

Kill VSSHost4 Process either through Task Manager or Via Power Shell Command

   stop-process -processname vssphost4 -force

Jayant Sharma