List always resets

my problem: you clicked a button and button added “test” to a empty list. then firebase stored it. another user, in another device, clicked same button and added “hello” to list. then firebase stored it. now list isnt “test”, “hello” - only “hello” there. it always resets list.

what can i do?

Then you should use append value to a specific tag in firebase. Correct way to use it is described in

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