Trying to Update DB table from html with php code not working

one text

Trying to update a database table so a user can "edit" what they already have input. I used the keyword Update instead of select or insert in my sql code but I come up with error:

Fatal error: Uncaught PDOException: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '* from OrdersLists where uname = 'Test', 'Test', 'Beer', '', '123 spooner street' at line 1 in /home/spemulli/public_html/Presentation3/EditOrder.php:84 Stack trace: #0 /home/spemulli/public_html/Presentation3/EditOrder.php(84): PDOStatement->execute() #1 {main} thrown in /home/spemulli/public_html/Presentation3/EditOrder.php on line 84

Any advice??

<?php
            if (isset($_POST['enter']))
            {
                //always initialized variables to be used
                $uname = "";
                $pwd = "";
                $cpwd = "";
                $fn = "";
                $ln = "";
                $gender = "";
                $addy = "";
                $quanity = "";
                
                $agree = "";

                $unameok = false;
                $pwdok = false;
                $agreeok = false;
                
                //take the information submitted and verify inputs
                $uname =  trim($_POST['userName']);
                $pwd = trim($_POST['pwd']);     
                $cpwd  = trim($_POST['confirmPwd']);            
                $fn = trim($_POST['firstName']); //always trim the user input to get rid of the additiona white spaces on both ends of the user input
                $ln = trim($_POST['lastName']);
                $gender = trim($_POST['gender']);
                $addy = trim($_POST['address']);
                $quantity = trim($_POST['quantity']);
                
                
                
                

                if (!spamcheck($uname))                         
                    $msg = $msg . '<br/><b>Email is not valid.</b>';
                else $unameok = true;

                if (!pwdValidate($pwd))
                    $msg = $msg . '<br/><b>Password is not in the required format.</b>';
                else {
                    if ($pwd != $cpwd)
                        $msg = $msg . '<br/><b>Passwords are not the same.</b>';
                    else $pwdok = true;
                }
                if (!isset($_POST['agree'])) {
                    $msg = $msg .  "<br/><b> You must agree to the terms and conditions </b><br />";
                    $term = '<span style="color:red">You must agree to the terms and conditions</span>';

                }
                else $agreeok = true;

                if ($unameok && $pwdok ) {
                    //enter data into the database
                    
                    $stmt = $con->prepare("UPDATE * from OrdersLists where uname = ?, ?, ?, ?, ?, ?");
                    if ($stmt->execute(array($fn, $ln, $gender, $agree, $addy, $quantity ))==TRUE)
                        $msg = '<font color = "red">Thank you for your Order.login.</font><br/>';
                        
                         //$stmt = $con->prepare("select * from OrderLists where name = ?"); $stmt->execute(array($_uname));
                    else $msg = "Your information cannot be entered this time. Please try again later.";
                    

                    
                }
                        
            }
        ?>

form action="EditOrder.php" method="post">
            <h1>Order Form</h1>
            <?php 
                print $msg;
                $msg = "";
            ?>
            <br />
            Username (email): <input type="text" maxlength = "50" value="default@email.com" name="userName" id="userName"   /> <br />
            Password: <input type="text" maxlength = "50" value="123456asdfgh" name="pwd" id="pwd"   />(Must be longer than 12 characters and contains at least 1 digit) <br />

            Confirm Password: <input type="text" maxlength = "50" value="123456asdfgh" name="confirmPwd" id="confirmPwd"   /> <br />

            First Name: <input type="text" maxlength = "50" value="Test" name="firstName" id="firstName"   /> <br />    
            Last Name: <input type="text" maxlength = "50" value="Test" name="lastName" id="lastName"   />  <br />  
            Address: <input type="text" maxlength ="50" value="123 spooner street, Indianapolis, Indiana" name="address" id="address" />(Enter Street, City, State) <br />
            Liquor Type: 
                <input type = "radio" name = "gender" value = "Beer" checked = "checked" />Beer
                <input type = "radio" name = "gender" value = "Wine" />Wine <br />
            Amount: <br />
                <input type = "text" maxlength = "50" value="quantity, be descriptive" name="quantity" id="quantity" /> <br />      
            <br />

            <input type="checkbox" name = "agree" value="y" /> 
            <?php print $term; ?>
            <br />


            <input name="enter" class="btn" type="submit" value="Submit" />
        </form>