{"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":"06848f7ecb826d44bd1f0ee4a14e95fd8d79cd2c0412ed6d2e699d9f5eb99b8a"}