diff --git a/frontend/src/preferences/preferenceSlice.ts b/frontend/src/preferences/preferenceSlice.ts
index edf582ce..fee3f30a 100644
--- a/frontend/src/preferences/preferenceSlice.ts
+++ b/frontend/src/preferences/preferenceSlice.ts
@@ -39,7 +39,7 @@ export const prefSlice = createSlice({
       state.selectedDocs = action.payload;
     },
     setSourceDocs: (state, action) => {
-      state.sourceDocs?.push(...action.payload);
+      state.sourceDocs = action.payload;
     },
   },
 });