Add the same categories in the destination post than the original post

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<div class=”btm”>Hi</div>
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<div>When I import a post I would like that the categories from the source post will be the same in the destination post.</div>
<div>So in the settings, I have selected “auto post categories”.</div>
<div>But it doesn’t work.</div>
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<div>Can you tell me how to fix it ? How to get the same categories from the original post?</div>
<div>Be aware that I put the same slug for the categories.</div>
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<div>Thanks</div>
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<div>Best regards</div>
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<div>Hannah</div>
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