diff --git a/CHANGES b/CHANGES
index 3263f9fb5..c5f26b37c 100644
--- a/CHANGES
+++ b/CHANGES
@@ -23,16 +23,13 @@ Incompatible changes
 * Due to the scoping changes for :rst:dir:`productionlist` some uses of
   :rst:role:`token` must be modified to include the scope which was previously
   ignored.
-* #6903: js domain: Internal data structure has changed. Both objects and
-  modules have node_id for cross reference
+* #6903: Internal data structure of Python, reST and standard domains have
+  changed.  The node_id is added to the index of objects and modules.  Now they
+  contains a pair of docname and node_id for cross reference.
 * #7210: js domain: Non intended behavior is removed such as ``parseInt_`` links
   to ``.. js:function:: parseInt``
-* #6903: rst domain: Internal data structure has changed. Now objects have
-  node_id for cross reference
 * #7229: rst domain: Non intended behavior is removed such as ``numref_`` links
   to ``.. rst:role:: numref``
-* #6903: py domain: Internal data structure has changed. Both objects and
-  modules have node_id for cross reference
 * #6903: py domain: Non intended behavior is removed such as ``say_hello_``
   links to ``.. py:function:: say_hello()``