diff --git a/py-polars/src/lazyframe/visitor/nodes.rs b/py-polars/src/lazyframe/visitor/nodes.rs
index 8ec73aff70c6..219ec49aa6b2 100644
--- a/py-polars/src/lazyframe/visitor/nodes.rs
+++ b/py-polars/src/lazyframe/visitor/nodes.rs
@@ -118,8 +118,6 @@ pub struct DataFrameScan {
 pub struct SimpleProjection {
     #[pyo3(get)]
     input: usize,
-    #[pyo3(get)]
-    duplicate_check: bool,
 }
 
 #[pyclass]
@@ -328,15 +326,9 @@ pub(crate) fn into_py(py: Python<'_>, plan: &IR) -> PyResult<PyObject> {
             selection: selection.as_ref().map(|e| e.into()),
         }
         .into_py(py),
-        IR::SimpleProjection {
-            input,
-            columns: _,
-            duplicate_check,
-        } => SimpleProjection {
-            input: input.0,
-            duplicate_check: *duplicate_check,
-        }
-        .into_py(py),
+        IR::SimpleProjection { input, columns: _ } => {
+            SimpleProjection { input: input.0 }.into_py(py)
+        },
         IR::Select {
             input,
             expr,
diff --git a/py-polars/tests/unit/functions/test_functions.py b/py-polars/tests/unit/functions/test_functions.py
index ba751caf6450..fea6fb8f9a1d 100644
--- a/py-polars/tests/unit/functions/test_functions.py
+++ b/py-polars/tests/unit/functions/test_functions.py
@@ -74,7 +74,6 @@ def test_concat_align_no_common_cols() -> None:
 def test_concat_diagonal(
     a: pl.DataFrame, b: pl.DataFrame, c: pl.DataFrame, strategy: ConcatMethod
 ) -> None:
-    print(a, b, c);
     for out in [
         pl.concat([a, b, c], how=strategy),
         pl.concat([a.lazy(), b.lazy(), c.lazy()], how=strategy).collect(),