Replace app SQLite database using ADB

I'm trying to replace the database of my app with ADB, on a rooted device. I follow these steps:

1. $adb shell
2. run-as my.app.package
3. cd databases
4. rm my_database.db
5. chmod 777 .
6. exit
7. exit
8. $adb push my_database.db /data/data/my.app.package/databases/my_database.db

The new database is copied successfully. But when open I launch my app again, it seems that the new database is deleted an created again. Why?

Thanks.