yes looks like a typo in cn1. I think that inside the delete function of the SQLMap class `if(count == 0)` (line 501) should be `if(count != 0)` which is the reason why the DELETE statement is malformed.
Until it is fixed by the CN1 team, you should try to create a simple SQL statement yourself to clean your table (TRUNCATE TABLE SignInListDetail should probably work and you could try TRUNCATE TABLE ? or DELETE FROM ? if you want to clean every table in you database) which should be more efficient anyway