diff --git a/draft-ietf-sidrops-8210bis.xml b/draft-ietf-sidrops-8210bis.xml
index ffb5950..93b6ba6 100644
--- a/draft-ietf-sidrops-8210bis.xml
+++ b/draft-ietf-sidrops-8210bis.xml
@@ -1783,8 +1783,9 @@ Cache                         Router
       <t>
         This section describes the meaning of the error codes.  There is
         an IANA registry where valid error codes are listed; see <xref
-        target="iana-err"/>.  Errors which are considered fatal MUST cause
-        the session to be dropped.
+        target="iana-err"/>.  Errors which are considered fatal MUST
+        cause the session to be dropped, and the router MUST flush all
+        data learned from that cache..
         <list style="hanging">
           <t hangText="0: Corrupt Data (fatal):">
             The receiver believes the received PDU to be corrupt in a