Duplicate id

This warning category is spelled c{[syntax.duplicate-ids]} by qmllint.

Found a duplicated id

What happened?

You used the same value for different ids.

Why is this bad?

The QML language forbids duplicate ids: they should all be unique in the same QML component.

Example

 import QtQuick

 Item {
     id: root
     Item {
         id: root
     }
 }

To fix this warning, rename the duplicate to become unique:

 import QtQuick

 Item {
     id: root
     Item {
         id: notRoot
     }
 }