1.17.1
[01:37:57] [C2ME worldgen worker #2/INFO]: [STDERR]: Detected different property settings in RandomizedIntBlockStateProvider! Expected null but got class_2758{name=age, clazz=class java.lang.Integer, values=[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25]}
[01:37:57] [C2ME worldgen worker #2/INFO]: [STDERR]: Detected different property settings in RandomizedIntBlockStateProvider! Expected null but got class_2758{name=age, clazz=class java.lang.Integer, values=[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25]}

FYI. Does this affect anything?

It can slightly impact performance for now. I'm still trying to figure out why so I left this warning.