Error in Activate Features from Visual Studio

Scenario:
I was re-deploying a solution from Visual Studio. My solution had custom Fields / Content Type declarations and was getting deployed to an existing site collection.

I noticed following errors :

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.

OR

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

Reason:
First of all this is not a problem with Solution. As if you use STSADM / Powershell to deploy and activate features, it will work fine.

Actually there is something going on with VSSPHost4 process.

Solution:
There are 2 solutions to this issue.

1. Close the Visual Studio and start again :)

2. Kill VSSPHost4 process. This can be done from SharePoint Powershell Management shell command prompt

stop-process -processname vssphost4 -force