diff --git a/src/main.js b/src/main.js
index 2c6f969..8abf49d 100644
--- a/src/main.js
+++ b/src/main.js
@@ -5949,6 +5949,7 @@ function stage() {
             for (let child of context.selection) {
               if (!context.activeObject.currentFrame) continue;
               if (!context.activeObject.currentFrame.keys) continue;
+              if (!child.idx in context.activeObject.currentFrame.keys) continue;
               context.activeObject.currentFrame.keys[child.idx].x +=
                 mouse.x - context.lastMouse.x;
               context.activeObject.currentFrame.keys[child.idx].y +=