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No, keep it in your library.
1) No harm if you hit it again
2) IF you get and update, make sure to run it again to restore JB. Then you would need to reinstall packages via ;log mrpi
3) IF you don’t run it after update, and you have teo updates in a row, or two factory resets in a row, or any combination of the two - you will lose JB for good. Depending on the JB situation at that future moment, you might or might not be able to do JB from scratch.
So, keep it just in case.
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