diff --git a/apps/app/src/lib/timeline.ts b/apps/app/src/lib/timeline.ts
index 0e5067a0..b4f0c31a 100644
--- a/apps/app/src/lib/timeline.ts
+++ b/apps/app/src/lib/timeline.ts
@@ -219,7 +219,7 @@ function sectionToTimelineObj(
 		if (usePart) {
 			// Add the part to the timeline:
 			const obj: TimelineObjEmpty | null = partToTimelineObj(
-				makeUniqueId(part.part.id),
+				makeUniqueId(`${id}_${part.part.id}`),
 				group,
 				part,
 				partStartTime,