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Anil IngleAnil Ingle 

Unable to upgrade Beta package on Testing Org

Hello All,

We have install Beta package on Enterprise Edition of Test Org.
Now our organization want to update new changes upload on Enterprise Edition. While new package installation we are getting following error message.

This app can't be upgraded.
There are problems that prevent this package from being installed. Cannot upgrade beta package You cannot upgrade a beta package, because developers can make incompatible changes to a package that has been released as a beta. To install a newer version of the package, you must first uninstall the existing version.

Please let me know, if anything we are missing.
Thanks in Advance.
SandhyaSandhya (Salesforce Developers) 

Beta packages cannot be upgraded.
You will have to uninstall to get the latest version. SFDC should help you restore your managed package data (in the installed package page) to help you restore your data after the re-install process has completed.
However, if your data structure has changed very much between versions this might not be helpful, and you should review the data you get BEFORE you uninstall.

Please refer below links for more information.
Hope this helps you!

Please mark it as Best Answer if my reply was helpful. It will make it available for other as the proper solution.
Thanks and Regards