How to fix "signatures do not match previously installed version" error? I'm using a Moto G6. With the latest update to android 9, they removed the capability of using the built-in Dolby Audio equalizer for some stupid reason. 

I found this Reddit post that had a way to modify the APK to make this work. I followed all the steps. I decided to try the 20 band equalizer steps and made a backup of the previous work before starting. However, when I finally got to the ADB install DaxUI2.apk, it didn't work. I got this error:


  adb: failed to install DaxUI2.apk: Failure [INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package com.dolby.dax2appUI signatures do not match previously installed version; ignoring!]


This was saddening, but no biggie, right? Because I already had a backup. I renamed the DaxUI2 folder to DaxUI2broken, renamed my backup to DaxUI2, and I tried again, with just the first part (minus the appendix). Once I did this, though, I got the exact same error.

I'd like to be able to fix this, so if anyone knows how, please tell me!
just uninstall the current app and then run it again.