1a88baa95ded3662e1e68ac162e30a7bef83cede
regenerateTreeIds shallow-copied each node's data, leaving data.props (and data.custom) as the same object reference between the original node and its duplicate/pasted copy. Craft.js's setProp mutates data.props in place, so editing the duplicate's props silently mutated the original too. Deep-clone data via structuredClone before applying id remaps so no mutable sub-object is shared between original and regenerated nodes. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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