diff --git a/lib/reducers/aux-user-reducer.js b/lib/reducers/aux-user-reducer.js
--- a/lib/reducers/aux-user-reducer.js
+++ b/lib/reducers/aux-user-reducer.js
@@ -39,22 +39,27 @@
     const replaceOperations: ReplaceAuxUserInfoOperation[] = [];
     for (const userID in state.auxUserInfos) {
       if (
-        state.auxUserInfos[userID].fid !== null &&
-        !toUpdateUserIDs.has(userID)
+        state.auxUserInfos[userID].fid === null ||
+        toUpdateUserIDs.has(userID)
       ) {
-        replaceOperations.push({
-          type: 'replace_aux_user_info',
-          payload: {
-            id: userID,
-            auxUserInfo: {
-              ...state.auxUserInfos[userID],
-              fid: null,
-            },
-          },
-        });
+        continue;
       }
+      replaceOperations.push({
+        type: 'replace_aux_user_info',
+        payload: {
+          id: userID,
+          auxUserInfo: {
+            ...state.auxUserInfos[userID],
+            fid: null,
+          },
+        },
+      });
     }
     for (const farcasterUser of action.payload.farcasterUsers) {
+      const existingAuxUserInfo = state.auxUserInfos[farcasterUser.userID];
+      if (existingAuxUserInfo?.fid === farcasterUser.farcasterID) {
+        continue;
+      }
       replaceOperations.push({
         type: 'replace_aux_user_info',
         payload: {