E101 - Duplicate slide id

Cause

Two slides in the deck share the same id:. Every slide id must be unique within a deck.

Example

{ slides: [
  { id: "intro", position: [0, 0], source: "a.slide.json" },
  { id: "intro", position: [1, 0], source: "b.slide.json" }
]}

How to fix

Rename one of the duplicates.