Contract Validity and Unilateral Error Regarding Property Classification

The court addressed a dispute concerning the validity of a sale contract, where the seller later claimed the contract was voidable due to a misunderstanding or error regarding the true nature of the object sold, specifically asserting the property was agricultural land when it was actually urbanizable land. The court upheld the lower court's decision, reasoning that a unilateral error by the seller regarding the legal classification of the property, which did not fundamentally prevent the meeting of the minds on the essential subject matter of the sale—the property itself—was insufficient to invalidate the contract, as the contract clearly identified the specific piece of real estate being transferred.