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_13150274_1 (years_of_operation VARCHAR, area_of_operation VARCHAR)

### Question ###
When was the operation in Field 103 executed? 

### Accurate SQL ###

SELECT years_of_operation FROM table_13150274_1 WHERE area_of_operation = "Field 103"