Id quotation
This warning category is spelled [syntax.id-quotation]
by qmllint.
Ids do not need quotation marks
What happened?
You surrounded an id with quotation marks.
Why is this bad?
This might lead to confusion between ids and strings. The QML language does not require quotation marks for ids and forbids more complex string expressions for ids.
Example
import QtQuick Item { id: "root" }
To fix this warning, remove the quotation marks:
import QtQuick Item { id: root }