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How do I programmatically delete a reference field value?

I have a multi-valued taxonomy reference field named field_classrooms in a node type. I use below code to delete the value in the field.

$node = DrupalnodeEntityNode::load('1512');
unset($node->field_classrooms[0]);
$node->save();

I can’t figure out what I am doing wrong here.

This article was republished from its original source.
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How do I programmatically delete a reference field value?

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