diff --git a/CHANGELOG.md b/CHANGELOG.md
index 93906aa0ec..afdd2a01a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,8 +4,15 @@ All notable changes to this project will be documented in this file. Dates are d
 
 Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
+#### [v6.143.1](https://github.com/opengovsg/FormSG/compare/v6.143.0...v6.143.1)
+
+- fix(mrf): ensure number of non-editable fields are still present [`#7617`](https://github.com/opengovsg/FormSG/pull/7617)
+- build: release v6.143.0 [`#7610`](https://github.com/opengovsg/FormSG/pull/7610)
+
 #### [v6.143.0](https://github.com/opengovsg/FormSG/compare/v6.142.0...v6.143.0)
 
+> 20 August 2024
+
 - feat: change nric mask toggle to nric collection toggle [`#7566`](https://github.com/opengovsg/FormSG/pull/7566)
 - fix(deps): bump type-fest from 4.24.0 to 4.25.0 in /shared [`#7606`](https://github.com/opengovsg/FormSG/pull/7606)
 - chore(deps-dev): bump elliptic from 6.5.4 to 6.5.7 in /frontend [`#7605`](https://github.com/opengovsg/FormSG/pull/7605)
@@ -13,6 +20,7 @@ Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 - fix(deps): bump libphonenumber-js from 1.11.5 to 1.11.7 in /shared [`#7603`](https://github.com/opengovsg/FormSG/pull/7603)
 - build: merge release v6.142.0 to develop [`#7602`](https://github.com/opengovsg/FormSG/pull/7602)
 - build: release v6.142.0 [`#7601`](https://github.com/opengovsg/FormSG/pull/7601)
+- chore: bump version to v6.143.0 [`377e808`](https://github.com/opengovsg/FormSG/commit/377e808ba4c62f687f798bcf1fe7831e45768512)
 
 #### [v6.142.0](https://github.com/opengovsg/FormSG/compare/v6.141.0...v6.142.0)
 
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 990a86ae15..7cc8ecb4df 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "form-frontend",
-  "version": "6.143.0",
+  "version": "6.143.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "form-frontend",
-      "version": "6.143.0",
+      "version": "6.143.1",
       "hasInstallScript": true,
       "dependencies": {
         "@chakra-ui/react": "^1.8.6",
diff --git a/frontend/package.json b/frontend/package.json
index 3df516afe1..f549301c71 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "form-frontend",
-  "version": "6.143.0",
+  "version": "6.143.1",
   "homepage": ".",
   "private": true,
   "dependencies": {
diff --git a/package-lock.json b/package-lock.json
index 547277e711..7ee54a4d52 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "FormSG",
-  "version": "6.143.0",
+  "version": "6.143.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "FormSG",
-      "version": "6.143.0",
+      "version": "6.143.1",
       "hasInstallScript": true,
       "dependencies": {
         "@aws-sdk/client-cloudwatch-logs": "^3.536.0",
diff --git a/package.json b/package.json
index 17aadb9fd5..43f74b84d0 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "FormSG",
   "description": "Form Manager for Government",
-  "version": "6.143.0",
+  "version": "6.143.1",
   "homepage": "https://form.gov.sg",
   "authors": [
     "FormSG <formsg@data.gov.sg>"
diff --git a/src/app/modules/submission/multirespondent-submission/multirespondent-submission.middleware.ts b/src/app/modules/submission/multirespondent-submission/multirespondent-submission.middleware.ts
index 1ce6591dee..8338ee8542 100644
--- a/src/app/modules/submission/multirespondent-submission/multirespondent-submission.middleware.ts
+++ b/src/app/modules/submission/multirespondent-submission/multirespondent-submission.middleware.ts
@@ -424,6 +424,7 @@ export const validateMultirespondentSubmission = async (
               )
               .andThen(() => {
                 // Step 3: Match non-editable response fields to previous version
+
                 const nonEditableFieldIdsWithResponses = Object.keys(
                   req.body.responses,
                 ).filter((fieldId) => !editableFieldIds.includes(fieldId))
@@ -461,6 +462,17 @@ export const validateMultirespondentSubmission = async (
                 const previousResponses =
                   previousSubmissionDecryptedContent.responses as ParsedClearFormFieldResponsesV3
 
+                const previousNonEditableFieldIdsWithResponses = Object.keys(
+                  previousResponses,
+                ).filter((fieldId) => !editableFieldIds.includes(fieldId))
+
+                for (const fieldId of previousNonEditableFieldIdsWithResponses) {
+                  // ensure that respondents cannot alter a non-editable field by omitting the field in the submission by re-inserting the previous fields that are non-editable
+                  if (!req.body.responses[fieldId]) {
+                    req.body.responses[fieldId] = previousResponses[fieldId]
+                  }
+                }
+
                 return Result.combine(
                   nonEditableFieldIdsWithResponses.map((fieldId) => {
                     const incomingResField = req.body.responses[fieldId]