diff --git a/services/apps/data_sink_worker/src/service/member.service.ts b/services/apps/data_sink_worker/src/service/member.service.ts
index 63ecfe0ed6..f14ad5bcc9 100644
--- a/services/apps/data_sink_worker/src/service/member.service.ts
+++ b/services/apps/data_sink_worker/src/service/member.service.ts
@@ -604,6 +604,22 @@ export default class MemberService extends LoggerBase {
     let attributes: Record<string, unknown> | undefined
     if (member.attributes) {
       const temp = mergeWith({}, dbMember.attributes, member.attributes)
+
+      const manuallyChangedFields: string[] = dbMember.manuallyChangedFields || []
+      if (manuallyChangedFields.length > 0) {
+        const attrColumn = 'attributes'
+        const manuallyChangedAttributes = (dbMember.manuallyChangedFields || [])
+          .filter((f) => f.startsWith(attrColumn))
+          .map((f) => f.substring(attrColumn.length))
+
+        // Preserve manually changed attributes
+        for (const key of manuallyChangedAttributes) {
+          if (dbMember.attributes[key] !== undefined) {
+            temp[key] = dbMember.attributes[key]
+          }
+        }
+      }
+
       if (!isEqual(temp, dbMember.attributes)) {
         attributes = temp
       }
diff --git a/services/libs/data-access-layer/src/old/apps/data_sink_worker/repo/member.data.ts b/services/libs/data-access-layer/src/old/apps/data_sink_worker/repo/member.data.ts
index a1a823c5df..947bddd45a 100644
--- a/services/libs/data-access-layer/src/old/apps/data_sink_worker/repo/member.data.ts
+++ b/services/libs/data-access-layer/src/old/apps/data_sink_worker/repo/member.data.ts
@@ -7,6 +7,7 @@ export interface IDbMember {
   joinedAt: string
   attributes: Record<string, unknown>
   reach: Partial<Record<PlatformType | 'total', number>>
+  manuallyChangedFields?: string[]
 }
 
 let getMemberColumnSet: DbColumnSet
@@ -14,7 +15,7 @@ export function getSelectMemberColumnSet(instance: DbInstance): DbColumnSet {
   if (getMemberColumnSet) return getMemberColumnSet
 
   getMemberColumnSet = new instance.helpers.ColumnSet(
-    ['id', 'score', 'joinedAt', 'reach', 'attributes', 'displayName'],
+    ['id', 'score', 'joinedAt', 'reach', 'attributes', 'displayName', 'manuallyChangedFields'],
     {
       table: {
         table: 'members',