what is the error? 07-26T13:50:57.768630+00:00
[2023-07-26, 16:52:57 MSK] {base.py:73} INFO - Using connection ID 'markout' for task execution.
[2023-07-26, 16:55:29 MSK] {taskinstance.py:1776} ERROR - Task failed with exception
Traceback (most recent call last):
  File "/home/airflow/.local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1901, in _execute_context
    cursor, statement, parameters, context
  File "/home/airflow/.local/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 736, in do_execute
    cursor.execute(statement, parameters)
psycopg2.errors.NotNullViolation: null value in column "Дата события" of relation "csv_import_events" violates not-null constraint
DETAIL:  Failing row contains (null, ;";";";";";";";";";";";";";";";2023.06.29 14:18:38", 3, , , , , , , null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, 11221, 2023-07-26T15:52:06.790729000, null).


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/airflow/.local/lib/python3.7/site-packages/airflow/operators/python.py", line 175, in execute
    return_value = self.execute_callable()
  File "/home/airflow/.local/lib/python3.7/site-packages/airflow/operators/python.py", line 192, in execute_callable
    return self.python_callable(*self.op_args, **self.op_kwargs)
  File "/opt/airflow/dags/csv_import_main.py", line 141, in write_data_to_database
    cm._psql_upsert(df, 'csv_import_events', 'staging', db = 'markout')
  File "/opt/airflow/dags/common.py", line 206, in _psql_upsert
    conn.execute(upsert_statement)
  File "/home/airflow/.local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1380, in execute
    return meth(self, multiparams, params, _EMPTY_EXECUTION_OPTS)
  File "/home/airflow/.local/lib/python3.7/site-packages/sqlalchemy/sql/elements.py", line 335, in _execute_on_connection
    self, multiparams, params, execution_options
  File "/home/airflow/.local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1582, in _execute_clauseelement
    cache_hit=cache_hit,
  File "/home/airflow/.local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1944, in _execute_context
    e, statement, parameters, cursor, context
  File "/home/airflow/.local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 2125, in _handle_dbapi_exception
    sqlalchemy_exception, with_traceback=exc_info[2], from_=e
  File "/home/airflow/.local/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 211, in raise_
    raise exception
  File "/home/airflow/.local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1901, in _execute_context
    cursor, statement, parameters, context
  File "/home/airflow/.local/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 736, in do_execute
    cursor.execute(statement, parameters)
sqlalchemy.exc.IntegrityError: (psycopg2.errors.NotNullViolation) null value in column "Дата события" of relation "csv_import_events" violates not-null constraint
DETAIL:  Failing row contains (null, ;";";";";";";";";";";";";";";";2023.06.29 14:18:38", 3, , , , , , , null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, 11221, 2023-07-26T15:52:06.790729000, null).