Use maximum chaos number to check for valid chaos numbers in import_app
in import_app/csv_parser.py
in method score_not_in_db(self)
the chaos number read from the bank statement is checked for validity. Right now this is done by checking if it's between 0 and max_int. Instead a check should be done to see if it's between min_value and max_value of this field.
Be aware, that if you just use a number larger than integer to filter with the sqlite database might crash on you.