diff --git a/application/CohortManager/src/Functions/ScreeningValidationService/LookupValidation/Breast_Screening_lookupRules.json b/application/CohortManager/src/Functions/ScreeningValidationService/LookupValidation/Breast_Screening_lookupRules.json
index 0060b164ae..62e4309823 100644
--- a/application/CohortManager/src/Functions/ScreeningValidationService/LookupValidation/Breast_Screening_lookupRules.json
+++ b/application/CohortManager/src/Functions/ScreeningValidationService/LookupValidation/Breast_Screening_lookupRules.json
@@ -62,7 +62,7 @@
         "Expression": "!(reasonForRemoval AND postcode AND primaryCareProvider)"
       },
       {
-        "RuleName": "17.AddressLinesNullAndPostcodeDoesNotMatchExisting.NBO.NonFatal",
+        "RuleName": "71.AddressLinesNullAndPostcodeDoesNotMatchExisting.NBO.NonFatal",
         "LocalParams": [
           {
             "Name": "addressLines",
diff --git a/application/CohortManager/src/Web/app/lib/ruleMapping.test.ts b/application/CohortManager/src/Web/app/lib/ruleMapping.test.ts
index 2f775d16a2..46a97524a0 100644
--- a/application/CohortManager/src/Web/app/lib/ruleMapping.test.ts
+++ b/application/CohortManager/src/Web/app/lib/ruleMapping.test.ts
@@ -4,7 +4,7 @@ describe("ruleMapping", () => {
   describe("ruleIdMappings", () => {
     it("should contain all expected rule IDs", () => {
       const expectedRuleIds = [
-        3, 8, 10, 17, 18, 21, 22, 30, 35, 39, 40, 54, 66, 69, 71,
+        3, 8, 17, 18, 30, 35, 39, 40, 54, 66, 71
       ];
       const actualRuleIds = Object.keys(ruleIdMappings).map(Number);
 
@@ -153,15 +153,5 @@ describe("ruleMapping", () => {
         expect(mapping.ruleDescription.trim()).not.toBe("");
       });
     });
-
-    it("should handle rules with empty moreDetails", () => {
-      // Rule 21 has empty moreDetails in the mapping
-      const result = getRuleMapping(21);
-      expect(result.moreDetails).toBe("");
-      expect(result.ruleDescription).toBe(
-        "The 'Superseded by NHS number' field has been populated with an NHS number by NBO."
-      );
-      expect(result.reportingId).toBe("CMR33");
-    });
   });
 });
diff --git a/application/CohortManager/src/Web/app/lib/ruleMapping.ts b/application/CohortManager/src/Web/app/lib/ruleMapping.ts
index 88b85c62e2..1dedb5aca1 100644
--- a/application/CohortManager/src/Web/app/lib/ruleMapping.ts
+++ b/application/CohortManager/src/Web/app/lib/ruleMapping.ts
@@ -15,12 +15,6 @@ export const ruleIdMappings: Record<number, RuleMapping> = {
     reportingId: "CMR4",
     portalFormTitle: "Raise with Cohorting as a Service (CaaS)",
   },
-  10: {
-    ruleDescription:
-      "Update received for NHS number with reason for removal of ‘DEA’.",
-    moreDetails: "An update has been received for a record marked as deceased.",
-    reportingId: "CMR36",
-  },
   17: {
     ruleDescription:
       "Date of birth is either missing, in the wrong format, or is in the future.",
@@ -35,20 +29,6 @@ export const ruleIdMappings: Record<number, RuleMapping> = {
       "Enter the date of death in the correct format. The date cannot be in the future.",
     reportingId: "CMR22",
   },
-  21: {
-    ruleDescription:
-      "The 'Superseded by NHS number' field has been populated with an NHS number by NBO.",
-    moreDetails: "",
-    reportingId: "CMR33",
-  },
-  22: {
-    ruleDescription:
-      "Amendment received for an NHS number that is not in this cohort.",
-    moreDetails:
-      "Raise with Cohorting as a Service (CaaS). An amendment cannot be applied as the record has not yet been added to the cohort. There may have been a delay in adding the new record to Cohort Manager.  ",
-    reportingId: "CMR39",
-    portalFormTitle: "Raise with Cohorting as a Service (CaaS)",
-  },
   30: {
     ruleDescription: "Postcode is in the wrong format.",
     moreDetails: "Enter a valid UK postcode.",
@@ -104,12 +84,6 @@ export const ruleIdMappings: Record<number, RuleMapping> = {
     reportingId: "CMR20",
     portalFormTitle: "Confused NHS numbers",
   },
-  69: {
-    ruleDescription: "NHS number’s invalid flag is set to true.",
-    moreDetails:
-      "An update has been received for the record with the NHS Number now flagged as invalid.",
-    reportingId: "CMR29",
-  },
   71: {
     ruleDescription: "Address is blank (postcode may be blank too).",
     moreDetails: "Enter the patient's full address and postcode.",
diff --git a/tests/UnitTests/ScreeningValidationServiceTests/LookupValidation/LookupValidationTests.cs b/tests/UnitTests/ScreeningValidationServiceTests/LookupValidation/LookupValidationTests.cs
index 88754f256d..74fa50507e 100644
--- a/tests/UnitTests/ScreeningValidationServiceTests/LookupValidation/LookupValidationTests.cs
+++ b/tests/UnitTests/ScreeningValidationServiceTests/LookupValidation/LookupValidationTests.cs
@@ -327,7 +327,7 @@ public async Task Run_AddressLinesNullAndPostcodeDoesNotMatchExisting_ReturnVali
         string body = await AssertionHelper.ReadResponseBodyAsync(response);
 
         // Assert
-        StringAssert.Contains(body, "17.AddressLinesNullAndPostcodeDoesNotMatchExisting.NBO.NonFatal");
+        StringAssert.Contains(body, "71.AddressLinesNullAndPostcodeDoesNotMatchExisting.NBO.NonFatal");
     }
 
     [DataRow(null, null, null, null, null, "RG2 5TX", "Existing Address 1", "Existing Address 2", "Existing Address 3", "Existing Address 4", "Existing Address 5", "RG2 5TX")]  // All New Address Fields Blank, Postcode exists, Existing Address fields full