K.S.A. 18-210

The detached territory shall not, by reason of such change, be released from the payment of its just and equitable proportions of any indebtedness incurred by the county to which it formerly belonged prior to and existing at the time of such change or detachment, nor shall such territory so detached be subject to the payment of any portion of indebtedness, either principal or interest, incurred or contracted by the county to which it becomes attached prior to the date of such change or attachment.