Update app.py

app.py

@@ -566,10 +566,14 @@ if 'data' not in st.session_state:
     st.session_state.data = read_data()
 
 # user id
+#user_id_from_url = get_param_from_url("user_id")
+#if user_id_from_url:
+#    st.session_state.user_id = user_id_from_url    
+# If user_id is in URL → set it
 user_id_from_url = get_param_from_url("user_id")
-if user_id_from_url:
+if user_id_from_url and not st.session_state.get("user_id"):
     st.session_state.user_id = user_id_from_url
-
+    
 # current index
 if 'current_index' not in st.session_state:
     start_index = get_start_index()
@@ -613,8 +617,8 @@ elif st.session_state.current_index == -1:
     if st.session_state.get('user_id'):
         navigate(1)
     else:
-        with st.form("data_form"):
-            st.session_state.user_id = st.text_input('User ID', value=user_id_from_url)
+        with st.form("user_id_form"):
+            st.session_state.user_id = st.text_input("User ID", value="")
             add_validated_submit([st.session_state.user_id], "Please enter a valid user ID")
 
 elif st.session_state.current_index < len(st.session_state.data):