diff --git a/src/pages/PublicNoticeDetail_GLD/GazetteDetailCard.js b/src/pages/PublicNoticeDetail_GLD/GazetteDetailCard.js
index a44b101..5a7c067 100644
--- a/src/pages/PublicNoticeDetail_GLD/GazetteDetailCard.js
+++ b/src/pages/PublicNoticeDetail_GLD/GazetteDetailCard.js
@@ -6,6 +6,7 @@ import {
     Stack, 
     Typography, FormLabel,
     OutlinedInput,
+    Dialog, DialogTitle, DialogContent, DialogActions,
 } from '@mui/material';
 import MainCard from "../../components/MainCard";
 import * as React from "react";
@@ -41,6 +42,9 @@ const GazetteDetailCard = (
     const [verified, setVerified] = useState(null);
     const [currentStatus, setCurrentStatus] = useState({});
 
+    const [isWarningPopUp, setIsWarningPopUp] = useState(false);
+    const [warningText, setWarningText] = useState("");
+
     const {register, 
         // getValues
     } = useForm()
@@ -68,9 +72,19 @@ const GazetteDetailCard = (
     }, [issueNum]);
 
     const groupDetailClick = () => () => {
-        setStatus("genGazetteCode")
+        if(gazetteCode==null){
+            setStatus("genGazetteCode");
+            return;
+        }
+        setWarningText("Gazette Code is already generated, are you sure to re-generate?");
+        setIsWarningPopUp(true);
     };
 
+    const callback =()=>{
+        setIsWarningPopUp(false);
+        setStatus("genGazetteCode");
+    }
+
     // useEffect(() => {
     //     //upload latest data to parent
     //     const values = getValues();
@@ -242,6 +256,18 @@ const GazetteDetailCard = (
                         </Grid>
                     </Grid>
                 </form>
+                <div>
+                <Dialog open={isWarningPopUp} onClose={() => setIsWarningPopUp(false)}  >
+                    <DialogTitle>Warning</DialogTitle>
+                    <DialogContent style={{ display: 'flex', }}>
+                        <Typography variant="h3" style={{ padding: '16px' }}>{warningText}</Typography>
+                    </DialogContent>
+                    <DialogActions>
+                        <Button onClick={() => setIsWarningPopUp(false)}>No</Button>
+                        <Button color="success" onClick={()=>callback()}>Yes</Button>
+                    </DialogActions>
+                </Dialog>
+            </div>
             </MainCard>
     );
 };