I need an undo button and i don't know how to do it

MIT App Inventor Help
1

I'm making a shopping list app for my mom and i want to put a button of undo in case she deletes accidentally an item of the shopping list. Can somebody help me ? And for my app i followed the exact same steps as this tutorial https://youtu.be/kBt2fzEba1c?si=1RM8WVmKnu1CRuhv

2

You should set Clear Items to only clear the global list items, do not clear the tinydb tag, then you can recover the last saved state of the list from tinydb

3

how i do that in the blocks help 0.o

4

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