Help needed handling 1k react checkboxes

function handleUserSelected(value: string) {
    const currentIndex = selectedUsers.indexOf(value);
    const newSelected = [...selectedUsers];

    if (currentIndex === -1) {
      newSelected.push(value);
    } else {
      newSelected.splice(currentIndex, 1);
    }

    setSelectedUsers(newSelected);
  }

function handleUserSelected(value: string) {
    const currentIndex = selectedUsers.indexOf(value);
    const newSelected = [...selectedUsers];

    if (currentIndex === -1) {
      newSelected.push(value);
    } else {
      newSelected.splice(currentIndex, 1);
    }

    setSelectedUsers(newSelected);
  }