1 Goto step3, import some sqls, it will display the sqls on the left tree.click all the sql tables.
2 then delete all the sqls.
Click the sql on left tree, it will pop error. please see the attachment.
Suggest after delete, it can refresh left tree.
After delete sql, then migrate other sql, it sqlid is same as source sql,click sql table on left tree, the table hasn't been changed.