"Error: Duplicate Resources" while building Android Studio Project ?

This the error I'm getting :

:app:mergeDebugResources
:app:mergeDebugResources FAILED
/Users/vedantdasswain/GitRepositories/EnergyLens/AndroidStudioVersion/EnergyLens/app/src/main/res/values/themes_apptheme.xml
Error:Error: Duplicate resources: /Users/vedantdasswain/GitRepositories/EnergyLens/AndroidStudioVersion/EnergyLens/app/src/main/res/values/themes_apptheme.xml:style/AppTheme, /Users/vedantdasswain/GitRepositories/EnergyLens/AndroidStudioVersion/EnergyLens/app/src/main/res/values/styles.xml:style/AppTheme
Error:Execution failed for task ':app:mergeDebugResources'.
> /Users/vedantdasswain/GitRepositories/EnergyLens/AndroidStudioVersion/EnergyLens/app/src/main/res/values/themes_apptheme.xml: Error: Duplicate resources: /Users/vedantdasswain/GitRepositories/EnergyLens/AndroidStudioVersion/EnergyLens/app/src/main/res/values/themes_apptheme.xml:style/AppTheme, /Users/vedantdasswain/GitRepositories/EnergyLens/AndroidStudioVersion/EnergyLens/app/src/main/res/values/styles.xml:style/AppTheme

The source of this error is the following file :

<item name="android:editTextBackground">@drawable/apptheme_edit_text_holo_light</item>

<item name="android:textColorHighlight">#99003366</item>
<item name="android:textSelectHandleLeft">@drawable/apptheme_text_select_handle_left</item>
<item name="android:textSelectHandleRight">@drawable/apptheme_text_select_handle_right</item>
<item name="android:textSelectHandle">@drawable/apptheme_text_select_handle_middle</item>

<item name="android:autoCompleteTextViewStyle">@style/AutoCompleteTextViewAppTheme</item>

<item name="android:listChoiceIndicatorMultiple">@drawable/apptheme_btn_check_holo_light</item>

<item name="android:listChoiceIndicatorSingle">@drawable/apptheme_btn_radio_holo_light</item>

<item name="android:buttonStyle">@style/ButtonAppTheme</item>

<item name="android:imageButtonStyle">@style/ImageButtonAppTheme</item>

<item name="android:dropDownSpinnerStyle">@style/SpinnerAppTheme</item>

<item name="android:listChoiceBackgroundIndicator">@drawable/apptheme_list_selector_holo_light</item>

<item name="android:activatedBackgroundIndicator">@drawable/apptheme_activated_background_holo_light</item>

<item name="android:fastScrollThumbDrawable">@drawable/apptheme_fastscroll_thumb_holo</item>

Could someone please explain what is causing the error and how to resolve it?