"An Act to revise the law in relation to arbitrations and awards", approved June 11, 1917, as amended, is repealed; provided, however, that any agreement entered into prior to the effective date of this Act to submit to arbitration a dispute existing at the date of the agreement shall be governed by said Act approved June 11, 1917; provided further, that this Act does not impair the validity of any proceeding under said Act, approved June 11, 1917, commenced prior to the effective date of this Act.
710 ILCS 5/23