{"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":"c9cc2f73f913dfcd0e8abc619a451d78b685761fc60dc74a13dd2dfce04ae961"}