Cant build my app from last year please help me

App Inventor is unable to compile this project.
The compiler error output was
________Preparing application icon
________Creating animation xml
________Creating style xml
________Creating provider_path xml
________Creating network_security_config xml
________Generating adaptive icon file
________Generating round adaptive icon file
________Generating adaptive icon background file
________Generating manifest file
________Attaching native libraries
________Attaching Android Archive (AAR) libraries
________Attaching component assets
________Invoking AAPT
AAPT time: 1.831 seconds
________Compiling source files
(compiling appinventor/ai_marwin_guiao_06/LISTAHAN_NG_WINA/Creating_acount.yail to appinventor.ai_marwin_guiao_06.LISTAHAN_NG_WINA.Creating_acount)
(compiling appinventor/ai_marwin_guiao_06/LISTAHAN_NG_WINA/Screen3.yail to appinventor.ai_marwin_guiao_06.LISTAHAN_NG_WINA.Screen3)

ERROR: appinventor/ai_marwin_guiao_06/LISTAHAN_NG_WINA/Screen3.yail line 338: duplicate declaration of 'back'

Kawa compile time: 12.037 seconds

no, i stop using appinventor for a year and a half, im just trying to update my app

Please read the post I've linked...

okay thank you very mucch

thank u very much, it successfully compiled

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