This prompt usually appears when writing cards. There are two reasons for this: one is that the card is not inserted properly or the card itself is damaged, resulting in card writing errors. One reason is that the original card issuing data is lost due to some reason, resulting in the loss of the system's random code and causing password comparison failure. When this error occurs, the first step is to stop continuing operations on the card. Then, through the sales details or sales inquiry, check whether all the sales records of the user's card exist, and verify whether the sales amount and total purchase amount for each transaction are correct. If there is data loss or error. Firstly, our service personnel need to complete the records, and then reissue the old user card. After inserting the reissued card into the user's electricity meter, electricity can be resold. If the card is damaged or the data is completely correct, simply replace the old user card and insert it into the user's electricity meter to resell the electricity.