copy from table to it again

[ابو ابراهيم]

i want to ask you a question 
    
i have a data in a table `answer` and i want to copy the data which
have a specific value in a filed and inserted into it again but i
will change the value 
   
i try to use this but it's give me an error 
 ======================= 
 INSERT INTO `answer` ( `answer` , `correct`,`qid` ) 
 SELECT a2.`answer` , a2.`correct` , 3 
 FROM `answer` as a2 where a2.qid=0 
=======================