将Bootstrap升级到4.2.1版本后出现问题。在这个版本中，当我使用id="#12"在accordion它不工作。在以前的版本中，它可以与配合使用id="#12"。有任何想法吗？
<div id="accordion">
<div class="card">
<div class="card-header" id="headingOne">
<h5 class="mb-0">
<button class="btn btn-link" data-toggle="collapse" data-target="#12"
aria-expanded="true" aria-controls="collapseOne">
Collapsible Group Item #1
</button>
</h5>
</div>
<div id="12" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
<div class="card-body">
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