When there is a conflict between my neighbor's real estate license 20 years ago and mine 30 years ago, which one shall prevail?

Article 1 (more than 30 years) shall prevail. \x0d\ The process of handling the real estate license is: \x0d\( 1) Within one month after the real estate transaction, the buyer and the seller shall handle the ownership transfer registration at the real estate exchange with the purchase contract and other documents. You need to bring your ID card, household registration book, commercial housing sales contract and other documents when you register. \x0d\(2) After receiving the notification from the Exchange to handle the transfer formalities, the buyer and the seller should bring their ID cards, household registration books, seals, etc. After paying the handling fee, deed tax and stamp duty, you can go through the transfer formalities. The exchange will issue a real estate sales contract to the buyer. In principle, the real estate license must be handled jointly by the buyer and the seller. If the buyer and the seller or one of them cannot handle the formalities of ownership transfer and property right registration for any reason, they may issue a power of attorney to entrust an agent to handle it on their behalf. \x0d\(3) After completing the transfer formalities, the buyer shall register and apply to the municipal or district (county) Housing and Land Administration Bureau where the house is located with the house sales contract issued by the real estate exchange within three months. The documents and materials needed to handle the application include: the house ownership certificate of the whole building owned by the seller, the commercial house sales contract, the copy of the stub of the commercial house sales invoice, the copy of the ID card, the registration form of the house ownership transfer, the wall boundary table and the area calculation table. \x0d\(4) After being audited by the real estate management department, the buyer can obtain the property right certificate.