diff --git a/shared/scripts/configuration/strings.py b/shared/scripts/configuration/strings.py
index 38be54e..c9af0fd 100644
--- a/shared/scripts/configuration/strings.py
+++ b/shared/scripts/configuration/strings.py
@@ -146,7 +146,7 @@ REJECTION_REASON = {
    16: "REQUEST_REJECT_REASON_SALINE_BOLUS_IN_PROGRESS",                # A saline bolus is in progress
    17: "REQUEST_REJECT_REASON_PARAM_OUT_OF_RANGE",                      # A treatment parameter is out of range
    18: "REQUEST_REJECT_REASON_HEPARIN_PRESTOP_EXCEEDS_DURATION",        # The Heparin pre-stop setting is greater than the treatment duration
-   19: "REQUEST_REJECT_REASON_AVAILABLE_1",                             # available reason slot
+   19: "REQUEST_REJECT_REASON_DG_FILTER_FLUSH_HAS_BEEN_EXPIRED",        # available reason slot
    20: "REQUEST_REJECT_REASON_AVAILABLE_2",                             # available reason slot 
    21: "REQUEST_REJECT_REASON_SALINE_MAX_VOLUME_REACHED",               # Saline bolus volume maximum has been reached - no more saline allowed
    22: "REQUEST_REJECT_REASON_SALINE_BOLUS_NOT_IN_PROGRESS",            # A saline bolus is not in progress