When you are going to install or re-install or update your APK-Package with your old data keep, please do the following things,
Just use
flag for that.-r
For example,
adb install -r myapp.apk
Extra
1) you may use this '-r'
flag, even a new APK install.
2) Don’t want to keep or override data of existing apk means, then don’t use this flag.