add code

app.py

@@ -805,7 +805,7 @@ The desired null value is also given. Populate the field with the null value of
                 st.session_state['selected_column'] = column_name
 
             # Form for input fields
-            with st.form(key='rule_form', clear_on_submit=True):
+            with st.form(key='rule_form'):
                 format_options = ["verbatim transcription", "spell check transcription", "boolean yes no", "boolean 1 0", "integer", "[list]", "yyyy-mm-dd"]
                 current_rule["format"] = st.selectbox("Format:", format_options, index=format_options.index(current_rule["format"]) if current_rule["format"] else 0)
                 current_rule["null_value"] = st.text_input("Null value:", value=current_rule["null_value"])