Skipping the uninstall step because the SharePoint Add-in is in an invalid state and cannot be uninstalled error in SharePoint hosted add-in

Recently while working on a SharePoint hosted add-in I got the below error which says:

Error occurred in deployment step ‘Install SharePoint Add-in’: A different version of this App is already installed with the same version number. You need to delete the app from the site and the site recycle bin to install this version.

Skipping the uninstall step because the SharePoint Add-in is in an invalid state and cannot be uninstalled.

Also read:
– How to use Deferred promise and then in Rest API in SharePoint Online or SharePoint 2013?

– Introduction to cloud computing and Microsoft Azure

– SharePoint Online Site Workflow and Initiation Form Parameters example using SharePoint designer workflow

The full error looks like below:

Solution:
We can change the version number to solve the issue. Here I have changed the version number to 1.0.0.1.

Then I tried deploying from visual studio and it worked fine for me.

Another approach:

$instances = Get-SPAppInstance -Web “UR Site URL”
$instance = $instances | where {$_.Title -eq ‘Name of the App’}
Uninstall-SPAppInstance -Identity $instance

Hope this will be helpful.