Upgrade a List definition WSP and install the feature.

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In order to avoid the data loss from an existing list, while creating a new list definition in the same solution,Follow the below steps....

1.Create a new list definition in a existing list definition solution.

2.Create a new feature (ex:"New_List_Feature").

3.Include the newly created list definition to a newly created feature.

4.Build and Publish the list definition WSP from a solution.

5.Upgrade a WSP using the following power shell script.
(Update-SPSolution -Identity wspname -LiteralPath Physicalpath -GACDeployment)

Update-SPSolution -Identity ListDefinition.wsp -LiteralPath C:\Users\username\Desktop\ListDefinition.wsp -GACDeployment 

 6.Install the newly created Feature using powershell script.

(Install-SPFeature FeatureFolderName)

 Install-SPFeature "ListDefinition_New_List_Feature"
where folder name available in the C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\TEMPLATE\FEATURES
Anandan is a SharePoint and Microsoft Azure consultant.He is having 9+ years of experience in the web, cloud, Machine Learning, IoT and mobile technology. He handled multi-platform solution as a consultant with the experience of designing, developing and deploying solutions by leveraging Microsoft, IBM, Apple, and Google technology stack, has played a dynamic role in the development of SharePoint and ML technologies. He writes articles related to SharePoint Online/On-Premises and Machine Learning.

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