diff --git a/crates/engine/src/atn_cmds.rs b/crates/engine/src/atn_cmds.rs
index d5c688f0a6..266de7faa8 100644
--- a/crates/engine/src/atn_cmds.rs
+++ b/crates/engine/src/atn_cmds.rs
@@ -1956,6 +1956,11 @@ fn duplicate_to(id: &str, p: &Value) -> Option<Descriptor> {
     if id == "layer.duplicate" && jstr(p, "document") == Some("new") {
         return None;
     }
+    // Photoshop's Duplicate has no in-place flag: a plain one would place the artboard copy beside
+    // the original on playback.
+    if id == "layer.duplicate" && jbool(p, "inPlace") == Some(true) {
+        return None;
+    }
     let mut d = match id {
         "layer.duplicate" => desc("null").with("null", layer_ref(p)),
         "image.duplicate" => {
diff --git a/crates/engine/src/atn_cmds/tests.rs b/crates/engine/src/atn_cmds/tests.rs
index c4fe00eb95..60fe381dab 100644
--- a/crates/engine/src/atn_cmds/tests.rs
+++ b/crates/engine/src/atn_cmds/tests.rs
@@ -1089,3 +1089,21 @@ fn add_noise_with_mask_target_is_not_exported_as_pixel_filter() {
         assert_eq!(imported.actions[0].steps, vec![("filter.noise.addNoise".to_string(), json!({"amount": 75, "seed": 123}))]);
     }
 }
+
+/// Photoshop's Duplicate Layer has no in-place flag: an in-place duplicate (the artboard copy
+/// that stays on the original) must not be exported as a plain duplicate, which places the
+/// copy beside the original on playback.
+#[test]
+fn duplicate_in_place_is_not_exported_as_plain_duplicate() {
+    let in_place = Action { name: "Probe".into(), steps: vec![("layer.duplicate".into(), json!({"inPlace": true}))], ..Default::default() };
+    assert!(export("Audit5", &[&in_place], &[], false).is_err());
+    let (_, skipped) = export("Audit5", &[&in_place], &[], true).unwrap();
+    assert_eq!(skipped, vec![Skipped { action: "Probe".into(), step: 0, id: "layer.duplicate".into() }]);
+    for params in [json!({}), json!({"inPlace": false})] {
+        let plain = Action { name: "Plain".into(), steps: vec![("layer.duplicate".into(), params)], ..Default::default() };
+        let (bytes, skipped) = export("Audit5", &[&plain], &[], false).unwrap();
+        assert!(skipped.is_empty());
+        let imported = import(&bytes).unwrap();
+        assert_eq!(imported.actions[0].steps, vec![("layer.duplicate".to_string(), json!({}))]);
+    }
+}