[v1.9.0] TypeError - OpenNumismat\Collection\Collection.py:1212

OpenNumismat: 1.9.0
OS: Windows 10 (10.0.19045)
Python: 3.11.3 (64bit)
Qt: 6.5.0
Locale: de

Traceback (most recent call last):
File "D:\OpenNumismat\open-numismat\open-numismat.py", line 20, in
File "OpenNumismat\__init__.py", line 10, in run
File "OpenNumismat\main.py", line 94, in main
File "OpenNumismat\MainWindow.py", line 846, in closeEvent
File "OpenNumismat\MainWindow.py", line 849, in __shutDown
File "OpenNumismat\MainWindow.py", line 869, in __saveParams
File "OpenNumismat\Collection\Collection.py", line 1212, in isNeedBackup
TypeError: '