{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How should errors be handled during the process of upgrading a blockchain version?","a":"Conduct a detailed analysis of the discovered error to find  out the cause of the error, so as to formulate targeted solutions."}]}],"pr":"36b75317d5d46b0451d9cf37f7e716b7396a0989667358cc1b6bb9899b3234bc"}