[Solved: Visual Studio Issue] Error occurred in deployment step 'Add Solution': A feature with ID 15/79d06575-2dbb-435f-939f-65e22c2ce360 has already been installed in this farm. Use the force attribute to explicitly re-install the feature.

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Open the visual Studio and navigate to the feature XML file and add the bellow attribute.
AlwaysForceInstall="TRUE"
The <FeatureName>.Template.Xml output would be some think link this.
<?xml version="1.0" encoding="utf-8" ?><Feature xmlns="http://schemas.microsoft.com/sharepoint/" AlwaysForceInstall="TRUE"></Feature>

After doing the above step the problem solved.

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