How to uninstall and then install it without loosing the previous data

[Souhitha Lakkak]

How do I not lose my previously created data when I uninstall and install the 'Supplier Lifecycle operations' Application in an instance

[Uncle Rob]

I suspect if you can uninstall something then its going to delete the data structure.
That means the data is going to go away.
So be sure to export the table data to XML prior to an uninstall, then import the same XML after you re-install it.