The edit method does not edit the pre-existing data but it creates a new data entry with NULL

`mysql> SELECT * FROM ListingDTO_DBTable;
+----+---------------------+
| Id | ListingName         |
+----+---------------------+
|  3 | palace of hormisdas |.  <----- this is super strange! at Id 3 the ListingName has not been edited at all! 
| 36 | NULL                | <----- instead a new entry has been created with a new Id and a new NULL value! the user input has not been saved at all
+----+---------------------+
2 rows in set (0.00 sec)