[v1.8.20] TypeError - OpenNumismat\ListView.py:111

OpenNumismat: 1.8.20
OS: Windows 10 (10.0.19045)
Python: 3.10.10 (64bit)
Qt: 5.15.9
Locale: en

Traceback (most recent call last):
File "OpenNumismat\PageView.py", line 649, in modelChanged
File "OpenNumismat\ListView.py", line 741, in modelChanged
File "OpenNumismat\ListView.py", line 111, in modelChanged
TypeError: %d format: a real number is required, not NoneType