{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to recover when a blockchain upgrade fails?","a":"Analyze the cause of the failure: First, a deep analysis of the reasons for the upgrade failure is needed, which may include software errors, configuration issues, network failures, etc."}]}],"pr":"10fe91e2cfc7bad3dbcf253d883593e19b0db86823364b3f78afea79abd59d75"}