Python Paramiko, PermissionError: [Errno 13] Permission denied - python-3.x

Question

There is a daemon that goes to a remote server and fetches files from it. Then performs operations on them. Some files it picks up without any problems. But it gives an error on one of them. I can't figure out why. The file extensions are identical.
Error on a file that was previously uploaded to the save folder. There were no other files in the save folder, so it works correctly. How do I get around this error so that sftp_client will update the file if it is already in the directory?
....
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy)
try:
ssh.connect(hostname=ip, username=user_name, password=passwd)
except Exception:
logger.info("Server is not available, check that the data entered is correct")
sys.exit()
sftp_client = ssh.open_sftp()
path_serv = '/home/lacit/defect_storage/' # Путь по которому производится поиск файлов
path_serv_file = sftp_client.listdir_attr(path=path_serv) # Все файлы в по данному пути
if path_serv_file:
for entry in path_serv_file:
checking_number = os.path.splitext(entry.filename)[0] # Split .png
try:
id_file_name = int(checking_number) # Checking for number
logger.info(f"Name of scan - {id_file_name}")
except ValueError:
logger.info(f"The scan name must have a numeric value \n Name of scan : {checking_number}")
sys.exit()
sftp_client.get(path_serv + entry.filename, '/home/ubuntu/media/' + entry.filename)
# Сохранение пути файла
path_file_save = '/home/ubuntu/media/' + entry.filename
# Переменная обновления даты
update_date = datetime.datetime.now()
logger.info(f"Try to save or update data for leather - {id_file_name}")
Defect.objects.update_or_create(id_leather=id_file_name,
defaults={'update': update_date,
'result_auto': None,
'result_manual': None,
'path': path_file_save})
logger.info("Try to call defection_start")
....
An error in the line sftp_client.get(path_serv + entry.filename, '/home/ubuntu/media/' + entry.filename)
Screenshot from the console