[BeyondImporter] custom attacks break after import with overwrite

[derammo]

according to this user, custom attacks created by hand break after re-importing the character, suggesting we have a major flaw in how we do overwrite, in terms of keeping identifiers consistent?

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from forum user Envaris:

Custom attacks should be ignored by the override toggle which they sorta are. I found what happened is that the details are correct. However, when clicked it does nothing. I had to into the custom attack in Roll20 edit something small, then re-edit back and it worked.

https://app.roll20.net/forum/post/6248700/script-beta-beyondimporter-import-dndbeyond-character-sheets/?pageforid=7052397#post-7052397