diff --git a/README b/README
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+While building the realease APK (using the command ./gradlew bundleRelease), it may gives you the error
+
+Execution failed for task ':app:mergeReleaseResources'
+[folder path] Error: Duplicate resources
+
+To solve this delete the following folders:
+android\app\src\main\res\drawable-hdpi
+android\app\src\main\res\drawable-mdpi
+android\app\src\main\res\drawable-xhdpi
+android\app\src\main\res\drawable-xxhdpi
+android\app\src\main\res\drawable-xxxhdpi
+android\app\src\main\res\raw
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