Native-run android --app platforms/android/app/build/outputs/apk/release/app-rel... exited with exit code 1

My project is currently using ionic 4. I have had no build problems until today.

I am seeing the following error:

 native-run android --app platforms/android/app/build/outputs/apk/release/app-release-unsigned.apk --device
[native-run] Selected hardware device 9A311FFAZ00BDM
[native-run] Installing platforms/android/app/build/outputs/apk/release/app-release-unsigned.apk...
[native-run] ERR_UNKNOWN: Non-zero exit code from adb: 1
[ERROR] An error occurred while running subprocess native-run.
        
        native-run android --app platforms/android/app/build/outputs/apk/release/app-rel... exited with exit code 1.

My ionic info is as follows:

Ionic:

   Ionic CLI                     : 6.8.0 (/Users/lester2/.nvm/versions/node/v12.9.0/lib/node_modules/@ionic/cli)
   Ionic Framework               : @ionic/angular 4.11.10
   @angular-devkit/build-angular : 0.803.26
   @angular-devkit/schematics    : 8.3.26
   @angular/cli                  : 8.3.26
   @ionic/angular-toolkit        : 2.2.0

Cordova:

   Cordova CLI       : 9.0.0 (cordova-lib@9.0.1)
   Cordova Platforms : android 8.1.0, ios 5.1.1
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 4.1.3, (and 10 other plugins)

Utility:

   cordova-res (update available: 0.14.0) : 0.6.0
   native-run (update available: 1.0.0)   : 0.2.8

System:

   ios-deploy : 1.9.4
   ios-sim    : 8.0.2
   NodeJS     : v12.9.0 (/Users/lester2/.nvm/versions/node/v12.9.0/bin/node)
   npm        : 6.14.4
   OS         : macOS Catalina
   Xcode      : Xcode 11.4.1 Build version 11E503a

Any help would be greatly appreciated.

I used the wrong command:
ionic cordova run android --prod --release
I should have used:
ionic cordova build android --prod --release