column "inv_no" referenced in foreign key constraint does not exist

CREATE TABLE invoice(

        inv_no          INTEGER         NOT NULL,
        cust_id         INTEGER         NOT NULL,
        inv_date        DATE            NOT NULL,
CONSTRAINT PK_invoice_inv_no PRIMARY KEY(inv_no),
CONSTRAINT FK_customer_cust_id FOREIGN KEY(cust_id) REFERENCES customer(cust_id)
);

CREATE TABLE invoiceLine(

        inv_line_no     INTEGER         NOT NULL,
        inv_line_qty    INTEGER         NOT NULL,
CONSTRAINT PK_invoiceLine_inv_line_no PRIMARY KEY(inv_line_no),
CONSTRAINT FK_invoice_inv_no FOREIGN KEY(inv_no) REFERENCES invoice(inv_no)
);

1

CREATE TABLE invoiceLine(

        inv_line_no     INTEGER         NOT NULL,
        inv_line_qty    INTEGER         NOT NULL,
CONSTRAINT PK_invoiceLine_inv_line_no PRIMARY KEY(inv_line_no),
CONSTRAINT FK_invoice_inv_no FOREIGN KEY(inv_line_no) REFERENCES invoice(inv_no)
);

CREATE TABLE invoiceLine(

    inv_line_no     INTEGER         NOT NULL,
    inv_line_qty    INTEGER         NOT NULL,
    inv_no          Integer         Not Null,
CONSTRAINT PK_invoiceLine_inv_line_no PRIMARY KEY(inv_line_no),
CONSTRAINT FK_invoice_inv_no FOREIGN KEY(inv_no) REFERENCES invoice(inv_no)
);