CREATE TABLE chat_robot_state_history (
    history_event_id SERIAL PRIMARY KEY,
    history_user_id character varying(36) NOT NULL,
    history_originator_id text,
    history_action text NOT NULL,
    history_timestamp integer NOT NULL,
    history_comment text,

    talk_id text not null,
    state_proto text not null,
    current_step text
);
