Uncaught SyntaxError: redeclaration of let secondNumber

[VitaliyMahnushevskiy]

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I can't fix the Syntax error. The console error complains about the secondNumber redeclaration. Please see the code below: const myBoolean = true; const myString = 'hello world'; const firstNumber = 20; let secondNumber = 40; secondNumber = 80; const myArray = [myBoolean, myString];

const myObject = { firstProperty: myArray, sumProperty: firstNumber + secondNumber};

console.log (myObject);

const sumProp = myObject.sumProperty; console.log (sumProp);