Somehow updates for our Windows Phone application (not universal, just silverlight!) are not properly installing the code: 81030137 appears during the installation. Tho when the users do the clean install - it installs just normally. I usually change the application versions in manifest file inside of Visual Studio 2015, so that after uploading package to the store it sees the right version there. I think the problem started appearing after i've upgraded the project from Windows Phone 8.0 to Windows Phone 8.1. The main problem here is that the issue is experienced by ALL the users, who try to update, not any certain ones, which leads to our clients' frustration. I need to find out what can cause the error; already tried the ms support and they've redirected me to the MSDN forums.
My question is: what should i as a developer do(change in a manifest, create a new one.. i dont know) to solve this problem for my customers?
At last I've found the solution, posting here in case someone will face the same problem:
for Windows Phone 8.1 you need to change the version for the package in 2 places: WMAppManifest.xml and Package.appxmanifest. The store during the upload process shows the version from WMAppManifest.xml, but(!) when you download the software and open history tab in store - version from Package.appxmanifest is shown. Seems that both versions must be more then the one before uploading the update.