How to set canOverrideExistingModule=true in React Native for Android Apps?

Go to file "MainApplication.java" (under .\android\app\src\main\java\com\projectName\)

Make sure that under getPackages() function you don't have duplicate lines (in my case I had "new MapsPackage()" twice).

Fix duplicate imports as well.

The name of the package associated to this error is not AirMapModule but MapsPackage from com.airbnb.android.react.maps.

In your MainApplication.java in directory : android/app/src/main/java/../../ remove any duplicate entry of :

• the import package : import com.airbnb.android.react.maps.MapsPackage
• the call to the constructor of the module : new MapsPackage() in function getPackages

Open the MainApplication.java file by this address: android/app/src/main/java/com/projectName/MainApplication.java and add the following code to MainApplication.java file:

@Override    
public boolean canOverrideExistingModule() {        
  return true;    
}   

And everything became correct.