Update app.py

app.py

@@ -441,9 +441,12 @@ def execute_unified_search(base_std, base_ver, base_cat, comp_std, comp_ver, com
             else:
                 df_mapping = pd.DataFrame(columns=['Base_section', 'Comp_section'])
 
-            implicit = pd.DataFrame({'Base_section': list(set(df_base['merge_key']) & set(df_comp['merge_key'])), 
-                                     'Comp_section': list(set(df_base['merge_key']) & set(df_comp['merge_key']))})
-            bridge = pd.concat([df_mapping, implicit], ignore_index=True).drop_duplicates()
+            if base_std.strip().upper() == comp_std.strip().upper():
+                implicit = pd.DataFrame({'Base_section': list(set(df_base['merge_key']) & set(df_comp['merge_key'])), 
+                                         'Comp_section': list(set(df_base['merge_key']) & set(df_comp['merge_key']))})
+                bridge = pd.concat([df_mapping, implicit], ignore_index=True).drop_duplicates()
+            else:
+                bridge = df_mapping.copy() 
 
             rename_b = {c: f"{c}_{base_ver}" for c in df_base.columns if c != 'merge_key'}
             df_base = df_base.rename(columns=rename_b)