{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the recovery measures that can be taken if the blockchain upgrade is not successful?","a":"Rollback to the  previous version: If issues arise during the upgrade process, try rolling back to the previous version to ensure the stability of the blockchain system."}]}],"pr":"53e847ab525730d54f5a3e78eeb6662f76f222e2973df530d0a8f15dcecf4924"}