[v1.8.2] TypeError - d:\OpenNumismat\open-numismat\OpenNumismat\Collection\Collection.py:1111

OpenNumismat: 1.8.2
OS: Windows 10 (10.0.17134)
Python: 3.4.4 (32bit)
Qt: 5.5.1
Locale: nl

Traceback (most recent call last):
File "d:\OpenNumismat\open-numismat\OpenNumismat\MainWindow.py", line 797, in closeEvent
File "d:\OpenNumismat\open-numismat\OpenNumismat\MainWindow.py", line 800, in __shutDown
File "d:\OpenNumismat\open-numismat\OpenNumismat\MainWindow.py", line 820, in __saveParams
File "d:\OpenNumismat\open-numismat\OpenNumismat\Collection\Collection.py", line 1111, in isNeedBackup
TypeError: unorderable types: NoneType() < int()