diff --git a/doc/sources.rst b/doc/sources.rst
index 6a98f64d..3775cba1 100644
--- a/doc/sources.rst
+++ b/doc/sources.rst
@@ -274,6 +274,10 @@ Website `(en) <https://www.insee.fr/en/information/2868055>`__,
 `(fr) <https://www.insee.fr/fr/information/2862759>`__
 
 - French name: Institut national de la statistique et des études économiques.
+- Known issue(s) with this data source:
+
+  - :issue:`205`: as of 2024-11-12 some structures, for instance ``urn:sdmx:…DataStructure=FR1:CNA-2014-PIB(1.0)``, include :attr:`~.Component.concept_identity` references that do not exist, for instance ``urn:sdmx:…Concept=FR1:CONCEPTS_INSEE(1.0).TIME_PERIOD`` and ``urn:sdmx:…Concept=FR1:CONCEPTS_INSEE(1.0).OBS_VALUE``.
+    From :ref:`v2.20.0 <2.20.0>`, :mod:`.reader.xml.v21` discards such invalid references, leaving :py:`.concept_identity = None`.
 
 .. autoclass:: sdmx.source.insee.Source()
    :members:
diff --git a/doc/whatsnew.rst b/doc/whatsnew.rst
index 578ad97b..5db8e699 100644
--- a/doc/whatsnew.rst
+++ b/doc/whatsnew.rst
@@ -3,8 +3,16 @@
 What's new?
 ***********
 
-.. Next release
-.. ============
+.. _2.20.0:
+
+Next release
+============
+
+- Improve tolerance of invalid references in SDMX-ML (:pull:`207`; thanks :gh-user:`nicolas-graves` for :issue:`205`).
+  Where a file gives a reference for a :attr:`.Component.concept_identity` (such as for a :class:`.Dimension` or :class:`.PrimaryMeasure`) that is invalid—that is, the specified :class:`.Concept` does not exist in the referenced :class:`.ConceptScheme`—log on level :data:`logging.WARNING` and discard the reference.
+  Previously such invalid references caused a :class:`KeyError`.
+  Prompted by an example in :ref:`INSEE <INSEE>`.
+- Update the base URL of the :ref:`WB <WB>` source to use HTTPS instead of plain HTTP (:pull:`207`).
 
 v2.19.1 (2024-10-23)
 ====================
@@ -36,7 +44,7 @@ v2.17.0 (2024-09-03)
   - :class:`.XHTMLAttributeValue` contents are stored as :mod:`lxml.etree` nodes.
   - MetadataStructureDefinition is included when writing :class:`.StructureMessage`.
 
-- Update base url for :ref:`WB_WDI` source to use HTTPS instead of plain HTTP (:issue:`191`, :pull:`192`).
+- Update the base url of the :ref:`WB_WDI <WB_WDI>` source to use HTTPS instead of plain HTTP (:issue:`191`, :pull:`192`).
 - Improvements to :mod:`.reader.xml` and :mod:`.reader.xml.v21` (:pull:`192`).
 
   - Correctly associate :class:`.Item` in :class:`.ItemScheme` with its parent, even if the parent is defined after the child (“forward reference”).