diff --git a/client/ayon_resolve/api/lib.py b/client/ayon_resolve/api/lib.py
index eee403ca1d..5beb3ddd6d 100644
--- a/client/ayon_resolve/api/lib.py
+++ b/client/ayon_resolve/api/lib.py
@@ -313,7 +313,11 @@ def create_timeline_item(
     timeline = timeline or get_current_timeline()
 
     # timing variables
-    if all([timeline_in, source_start, source_end]):
+    if all([
+        timeline_in is not None,
+        source_start is not None,
+        source_end is not None
+    ]):
         fps = timeline.GetSetting("timelineFrameRate")
         duration = source_end - source_start
         timecode_in = frames_to_timecode(timeline_in, fps)