Ошибка при запуске.

[iLnurZ]

Traceback (most recent call last):
File "C:\tink\main.py", line 17, in
import data_parser
File "C:\tink\data_parser.py", line 175, in
config = Config()
File "C:\tink\configuration.py", line 52, in init
'start_year': int(start_year),
ValueError: invalid literal for int() with base 10: 'start_year: 2021'