How to insert data into another database table only if it does not exist?

Question

I would like it if, by inserting it in the Customers table in the bank 1, it were inserted in the Customers table in the bank 2, but only if there is no more. Currently my code is like this:

DELIMITER $$
CREATE TRIGGER trIntegracaoBancos AFTER INSERT
ON banco1.clientes FOR EACH ROW

BEGIN
    IF NOT EXISTS (SELECT id FROM banco2.Clientes) THEN
            INSERT INTO banco2.Clientes (id, nome, dat_nascimento, cpf, rg, endereco, numero, bairro, cidade, estado, cep)
            SELECT id, nome, dat_nascimento, cpf, rg, endereco, numero, bairro, cidade, estado, cep;
    END IF;
END;

$$

The if check should check if there is no.