Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_41 ( date_of_departure VARCHAR, replaced_by VARCHAR )

### Question ###
When was the departure date when a manager was replaced by Bojan Pra nikar?

### Accurate SQL ###

SELECT date_of_departure FROM table_name_41 WHERE replaced_by = "bojan prašnikar"