Court allows appeal, voids judgment, and remands case for new proceedings regarding simultaneous performance agreement.

The court granted the appeal, set aside the contested judgment, and remanded the case to the first-instance court for a new proceeding. The core fact involves an agreement on contract rescission conditioned on the fulfillment of the counterparty's obligation, which the parties argue constitutes simultaneous performance. The court ruled that until the counterparty fulfills their obligation, the rescission does not take effect, thereby validating the original contract in full.