According to the requirements of this project is to implement the synchronization between the two databases, USES is syncnavigator software, mysql to change data in SQL server, delete, add data can be, but in the SQL server to mysql synchronization has a foreign key relationships' product 'and' category, two tables can change within the data synchronization to mysql, and within the syncnavigator synchronous log remind: "unable to delete the target database in mysql has failure data", how do you solve? The younger brother grateful