After the ratification of this Constitution, no new debt shall be created against, or incurred by this state, or its authority, except to repel invasion or suppress insurrection, and then only by a concurrence of two-thirds of the members of each house of the legislature, and the vote shall be taken by yeas and nays and entered on the journals; and any act creating or incurring any new debt against this state, except as herein provided for, shall be absolutely void; provided, the governor may be authorized to negotiate temporary loans, never to exceed three hundred thousand dollars, to meet the deficiencies in the treasury, and until the same is paid no new loan shall be negotiated; provided, further, that this section shall not be so construed as to prevent the issuance of bonds for the purpose of refunding the existing bonded indebtedness of the state.