У меня ошибка при обновлении SQL с node js

Question

Я использую for-l oop для обновления sql команды.

вот так

for(var i=count1; i < count2;i++){        
  Book.TimeStart = Times[I]
  console.log(Book.TimeStart)
  sql = sql + `UPDATE projectroom.Details SET BookingId = `+Book.BookingId+`, status = 'W' 
  WHERE RoomID = `+Book.RoomID+` 
  and dates = '`+Book.Dates+`'
  and TimeId = (Select TimeId from projectroom.Timeslot where TimeStart = '`+Book.TimeStart+`'); \n`
}

, если данные из JSON попадают в l oop только один раз , это не ошибка.

, но она получает в oop больше единицы. это ошибка (Я настраиваю с mySQL)

это моя ошибка:

code: 'ER_PARSE_ERROR',
  errno: 1064,
  sqlMessage: "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UPDATE projectroom.Details
SET BookingId = 193, status = 'W' WHERE RoomID = 101 ' at line 2",
  sqlState: '42000',
  index: 0,
  sql: "UPDATE projectroom.Details SET BookingId = 193, status = 'W' WHERE RoomID = 101 and dates = '2020-03-16'and TimeId = (Select TimeId from projectroom.Timeslot where TimeStart = '09:00:00'); \n" +
    "UPDATE projectroom.Details SET BookingId = 193, status = 'W' WHERE RoomID = 101 and dates = '2020-03-16'and TimeId = (Select TimeId from projectroom.Timeslot where TimeStart = '09:30:00'); \n" +
    "UPDATE projectroom.Details SET BookingId = 193, status = 'W' WHERE RoomID = 101 and dates = '2020-03-16'and TimeId = (Select TimeId from projectroom.Timeslot where TimeStart = '10:00:00'); \n"
}