Update changelog [skip ci]
diff --git a/NEWS.rst b/NEWS.rst
index be83f83..afd85e1 100644
--- a/NEWS.rst
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@@ -1,3 +1,6 @@
+- [subset] Fixed AttributeError when SinglePos subtable has None Value (ValueFormat 0)
+  (#2312, #2313).
+
 4.24.0 (released 2021-05-17)
 ----------------------------