Legal Question in Civil Litigation in California

You don't just "mistakenly" sign a stipulation. It does not matter if you could win or not, you settled it...you were not railroaded, you had every opportunity to reject it... I suppose this is what happens in a self represented situation but since self represented parties are held to same standard as if they had attorneys. To void out a sure you can always try and set it aside but it would be because of fraud, illegality, duress, mistake, undue influence. This will be an uphill battle and can't just be because you have buyers remorse,.