How to construct a button which then deactivates after i update a row?

PHP
5

what i have done is make comment and select the department then update it in the database and then now i want the update button to be deactivated once it update the comment and department also put another button in another page which will activate the update button ? A little help please. Thank you. This is my code for updating comment and department.

<?php
mysqli_report(MYSQLI_REPORT_ERROR|MYSQLI_REPORT_STRICT);
$conn = mysqli_connect("localhost","root", "","registration");

//
//   PROCESS POSTED DATA
//
        if ($_SERVER['REQUEST_METHOD']=='POST') {
            $stmt = $conn->prepare("UPDATE proposals
                                    SET
                                        comment = ?,
                                        department = ?
                                    WHERE id = ?
                                    ");
            $stmt->bind_param('ssi', $_POST['comment'], $_POST['department'], $_POST['id']);
            ($stmt->execute());
            
        }


if (!isset($_GET['id']) || trim($_GET['id'])=='') {
    header("Location: ");
    exit;
}

$res = $conn->prepare("SELECT id
                            , details
                            , location
                            , date
                            , time
                            , checkbox
                            , name
                            , agegender
                            , contact
                            , empid
                            , department
                            , organization
                            , summary
                            , outcome
                            , cause
                            , action
                            , reportedname
                            , position
                            , organisation
                            , reportedcontact
                            , status
                            , comment
                            , department
                       FROM proposals
                       WHERE id = ?
                       ");
$res->bind_param('i', $_GET['id']);
$res->execute();
$res->bind_result($id,$details,$location,$date,$time,$checkbox,$name,$agegender,$contact,$empid,$department,$organization,$summary,$outcome,$cause,$action,$reportedname,$position,$organisation,$reportedcontact,$status,$comment,$department);
$res->fetch();
$res->close();

//
//  status-dependent processing
//

               

?>

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-language" content="en">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<style type='text/css'>
    body  { font-family: calibri, sans; font-size: 12pt; }
    label { display: inline-block; width: 210px; background-color:#E4EBC5; color:orangered; padding: 8px; font-weight: 600; margin-right:30px; vertical-align: top;}
    .data { display: inline-block; width: 75%; background-color: beige; position: relative; top:10px;}
    /*.comment { display: inline-block; width: 450px; vertical-align: top;}  */
</style>
</head>
<body>
<header style="text-align:center; font-size:20px; inline-block; width: 210px; position: relative; left:40%; top:40px; font-weight: bold; background-color:#E4EBC5;">DETAILS</header>
<div class='w3-container'> 
    <form method='POST' id='formId'>
    
    <input type='hidden' name='id' value='<?=$id?>'>
    <div class="w3-card w3-padding" style='max-width: 100%; margin: 80px auto;'>
        <div>
            <label>ID :</label>
            <div class="data"><?=$_GET['id']?></div>
        </div>
         <div>
            <label>Details :</label>
            <div class="data"><?=$details?></div>
        </div>  
        <div>
            <label>Location</label>
            <div class="data"><?=$location?></div>
        </div>
        <div>
            <label>Date :</label>
            <div class="data"><?=$date?></div>
        </div>
        <div>
            <label>Time :</label>
            <div class="data"><?=$time?></div>
        </div>
        <div>
            <label>Checkbox :</label>
            <div class="data"><?=$checkbox?></div>
        </div>
        <div>
            <label>Name(Injured) :</label>
            <div class="data"><?=$name?></div>
        </div>
        <div>
            <label>Age/Gender(Injured) :</label>
            <div class="data"><?=$agegender?></div>
        </div>
        <div>
            <label>Contact(Injured) :</label>
            <div class="data"><?=$contact?></div>
        </div>
        <div>
            <label>Employee ID(Injured) :</label>
            <div class="data"><?=$empid?></div>
        </div>
        <div>
            <label>Department(Injured) :</label>
            <div class="data"><?=$department?></div>
        </div>
        <div>
            <label>Organization(Injured) :</label>
            <div class="data"><?=$organization?></div>
        </div>
        <div>
            <label>Summary :</label>
            <div class="data"><?=$summary?></div>
        </div>
        <div>
            <label>Outcome :</label>
            <div class="data"><?=$outcome?></div>
        </div>
        <div>
            <label>Cause :</label>
            <div class="data"><?=$cause?></div>
        </div>
        <div>
            <label>Action :</label>
            <div class="data"><?=$action?></div>
        </div>
        <div>
            <label>Reported by Name :</label>
            <div class="data"><?=$reportedname?></div>
        </div>
        <div>
            <label>Reported Position :</label>
            <div class="data"><?=$position?></div>
        </div>
        <div>
            <label>Reported Organisation :</label>
            <div class="data"><?=$organisation?></div>
        </div>
        <div>
            <label>Reported Contact :</label>
            <div class="data"><?=$reportedcontact?></div>
        </div>
        
        <div>
            <label>Nearmiss Status :</label>
            <div class="data"><?=$status?></div>
        </div>
         <div class="data">
        <label>Select Department :</label>    
        <input type='hidden' name='department'>
                <tr>
    <td><select name='department'>
    <option value='' selected>Select Department</option>
    <option value='Civil'>Civil</option>
    <option value='O&M'>O&M</option>
    <option value='C&M'>C&M</option>
    <option value='MMD'>MMD</option>
    <option value='Logistics'>Logistics</option>
    <option value='HR&ADMIN'>HR&ADMIN</option>
    <option value='Fire & Safety'>Fire & Safety</option>
    <option value='IT & MIS'>IT & MIS</option>
    <option value='F&M'>F&M</option>
    <option value='EMD'>EMD</option>
    <option value='C&I'>C&I</option>
    <option value='Store'>Store</option>
    <option value='EHS'>EHS</option>
    <option value='Tech Cell'>Tech Cell</option>
    <option value='Operation'>Operation</option>
        
  </select></td>
    </tr>
      </div>       
 
        
        <div>
            <label>Slected Dept :</label>
            <div class="data"><?=$department?></div>
        </div>
        <div>
            <label>Comment :</label>
            <div class="data"><textarea name='comment' class='w3-input w3-border' rows='5'><?=$comment?></textarea></div>
        </div>
       
   
   <div class="data"> <input type="submit" value="Submit" name="btnSubmit" id="btnSubmit"/></div>
       
    </form>
    </div>
    </div>