D:\dev_tools\win>adb install -r xxx-debug.apk
6813 KB/s (7396703 bytes in 1.060s)
pkg: /data/local/tmp/xxx-debug.apk
Failure [INSTALL_FAILED_UPDATE_INCOMPATIBLE]
It is usually caused by the application that has not been uninstalled cleanly before.
1. So first go to Settings -> Application Installation and Management -> Click to open the corresponding application, stop first and then uninstall.
2. If it still doesn't work, go to /data/data to delete the corresponding application directory.
3. Enter /system/app and delete the corresponding application directory
4. Enter the /system/prev-app directory and delete the corresponding application directory
Restart and try again, it's ok