diff --git a/documentation/ref-manual/tasks.rst b/documentation/ref-manual/tasks.rst
index 7a0915c6e57a..79469bc37221 100644
--- a/documentation/ref-manual/tasks.rst
+++ b/documentation/ref-manual/tasks.rst
@@ -514,6 +514,18 @@ When you run the :ref:`ref-tasks-cleansstate` task, the OpenEmbedded build syste
 no longer uses any sstate. Consequently, building the recipe from
 scratch is guaranteed.
 
+.. note::
+
+   Using :ref:`ref-tasks-cleansstate` with a shared :term:`SSTATE_DIR` is
+   not recommended because it could trigger an error during the build of a
+   separate bitbake instance. This is because the builds check sstate "up
+   front" but download the files later, so it if is deleted in the
+   meantime, it will cause an error but not a total failure as it will
+   rebuild it.
+
+   The reliable and preferred way to force a new build is to use ``bitbake
+   -f`` instead.
+
 .. note::
 
    The :ref:`ref-tasks-cleansstate` task cannot remove sstate from a remote sstate