mysql deal with specail character problem

[赵琦]

Hi:
I have a table that the field a is primary key;
I insert a record like this
insert into table(a,b,c) values('济公全传③',1,1)
Then i insert a record like this
 insert into table(a,b,c) values('济公全传②',1,1)

mysql post a error execute failed: Duplicate entry '济公全传②-1-1' for key 1;

it is strange, the primary key field is not the same, but i get this error.

any one can help me?

Thanks