diff --git a/docarray/array/document.py b/docarray/array/document.py
index 1daedf089b6..c5395622b1f 100644
--- a/docarray/array/document.py
+++ b/docarray/array/document.py
@@ -47,7 +47,7 @@ def __init__(
                 self._rebuild_id2offset()
             elif isinstance(docs, DocumentArray):
                 self._data = docs._data
-                self._id_to_index = docs._id_to_index
+                self._id_to_index = docs._id2offset
             else:
                 self._data = list(docs)
                 self._rebuild_id2offset()