Foreach duplicating checkbox inputs form

Instead of having 2 inputs with the full-time and the contractor box ticked, I have 4 inputs see below. How can I avoid the duplication of the inputs, and ends up with two inputs only that will have the boxes ticked for full-time and contractor?

Here is the code:

    <?php       
      $jobEmploymentType = "FULL_TIME,CONTRACTOR";
       $jobEmploymentTypeExplode = (explode(",",$jobEmploymentType));   
    //print_r($jobEmploymentTypeExplode);
           foreach ($jobEmploymentTypeExplode as $jobType) : ?>
                
   <span class="asterisk">*</span>  <label for="jobEmploymentType">Employment Type</label><br>
  <input type="checkbox" class="w3-check" id="fullTime" name="fullTime" value="FULL_TIME" <?= ($jobType == "FULL_TIME")? "checked":"";?>>
  <label for="fullTime"> FULL-TIME</label><br> 

  <input type="checkbox" class="w3-check" id="contractor" name="contractor" value="CONTRACTOR" <?= ($jobType == "CONTRACTOR")? "checked":"";?>>
  <label for="contractor"> CONTRACTOR</label><br>
        <?php endforeach; ?> 

Expecting result: