Change link category after undo a deletion

@plutohg wrote:

Hi, i have recently have a problem after i delete a link and undo the deletion, at this stage i cannot change link category anymore, where i use diagram.model.setCategoryForLinkData(link, 'sth').

it seems to goes to a bad state after undo the deletion, as before this setCategoryForLinkData works fine.

Any idea or work around? thanks

btw i am using latest gojs version (1.8.20)

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