Duplicate values are echoed

[XTSR]

So I am getting data from my table and I used a while loop for it but there are duplicates being printed out. How to fix it?
Here is my script/code:

$db= mysqli_connect('localhost', 'root', '', 'dbclientpetinfosys');
        
            if ($db->connect_error) {
                die("Connection failed: " . $db->connect_error);
            }
            
            $quePetProfile = "SELECT tblPet.strPetID, tblPet.strPetName, tblPet.strSpecies, tblPet.dbltAge, tblPet.strGender, tblBreed.strBreed
                            FROM tblPet
                            INNER JOIN tblBreed    
                            ON tblPet.strRegistrationID = tblBreed.strRegistrationID
                            LEFT JOIN abandoned
                            ON tblPet.strPetID = abandoned.strPetID
                            WHERE tblPet.strRegistrationID = '{$_SESSION['RegID']}' AND abandoned.strPetID IS NULL";
                        $stmtGetPet = mysqli_query($db, $quePetProfile);
                        while($arrRow2 = mysqli_fetch_array($stmtGetPet)){
                                        echo '<tr>';
                    echo '<td>'. $arrRow2['strPetID'] .'</td>';
                    echo '<td>' . $arrRow2['strPetName'] . '</td>';
                    echo '<td>' . $arrRow2['strSpecies'] . '</td>';
                    echo '<td>' . $arrRow2['dbltAge'] . '</td>';
                    echo '<td>' . $arrRow2['strGender'] . '</td>';
                    echo '<td>' . $arrRow2['strBreed'] . '</td>';
                    echo '</tr>';
                        } 

[Deadweight]

This is because of your left join. You most likely have multiple tblPet.strPetID = abandoended.strPetID.