Index: MsgDefs.h
===================================================================
diff -u -r4e174a6da0995a4c4813a766862e2a63022e7e14 -rc5aa34ab7c6c9f740a2cc2041628cd3ab972a273
--- MsgDefs.h	(.../MsgDefs.h)	(revision 4e174a6da0995a4c4813a766862e2a63022e7e14)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision c5aa34ab7c6c9f740a2cc2041628cd3ab972a273)
@@ -9,7 +9,7 @@
 * @file    MsgDefs.h
 *
 * @author  (last)      Michael Garthwaite
-* @date    (last)      07-Apr-2026
+* @date    (last)      15-Apr-2026
 *
 * @author  (original)  Sean Nash
 * @date    (original)  01-Aug-2024
@@ -366,8 +366,8 @@
     MSG_ID_DD_BICART_CARTRIDGE_SELECT_OVERRIDE_REQUEST = 0xA05B,                        ///< DD bicarb cartridge select(small-0, large-1) overrride request
     MSG_ID_DD_SET_CONDUCTIVITY_MODEL_REQUEST = 0xA05C,                                  ///< DD set conductivity model to conductivity sensors ( also applies to FP conductivity sensors )
     MSG_ID_DD_CONDUCTIVITY_SENSOR_RESISTANCE_OVERRIDE_REQUEST = 0xA05D,                 ///< DD conductivity sensor resistance override request
-    MSG_ID_DD_CONDUCTIVITY_SENSOR_VERSION_REQUEST = 0xB05E,                             ///< DD conductivity sensor version request
-    MSG_ID_DD_CONDUCTIVITY_SENSOR_VERSION_RESPONSE = 0xB05F,                            ///< DD conductivity sensor version response
+    MSG_ID_DD_CONDUCTIVITY_SENSOR_VERSION_REQUEST = 0xA05E,                             ///< DD conductivity sensor version request
+    MSG_ID_DD_CONDUCTIVITY_SENSOR_VERSION_RESPONSE = 0xA05F,                            ///< DD conductivity sensor version response
 
     MSG_ID_FIRST_FP_TESTER_MESSAGE = 0xB000,                                            ///< First FP test message ID
     MSG_ID_FP_TESTER_LOGIN_REQUEST = MSG_ID_FIRST_FP_TESTER_MESSAGE,                    ///< FP tester log-in