This change is related to the DataGrid component removal in .NET Core 3.1 (see Windows Forms Controls Removal for additional information).
We had to replace the obsolete DataGrid component with our GridControl in the Series Point Collection editor. We also removed the ITypedList interface dependency because it affected some aspects of the Series Point Collection editor.
You do not need to modify your source code unless you explicitly called the ITypedList interface methods of the SeriesPointCollection object.