A feature with ID GUID has already been installed in this farm. Use the force attribute to explicitl
What? A feature with ID <Your GUID here> has already been installed in this farm. Use the force attribute to explicitly re-install the feature. Ah man.. just when I though SharePoint loves me today. No luck in Solution Management, so I try spsolutions in powershell.. still no luck
A wild WSP appears!
I choose you, STSADM!
STSADM uses-o deploysolution-name solution.wsp -force -immediate -allowGacDeployment -url http://<site>
It’s super effective!