How can you stop users from editing list items that other members created?
In the list's advanced settings, under Create and edit access, select Create items that were created by the user.
In the list's advanced settings, under Create and edit access, select None.
In the list's advanced settings, under Create and edit access, select Create items and edit items that were created by the user.
In the list's advanced settings, under Create and edit access, select Create and edit all items.