diff --git a/CHANGELOG.md b/CHANGELOG.md
index e9f20f6e6..cf457c700 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,13 @@ Many parts of the Spine data structure have been redesigned.
   The functionality that was previously implemented using the is_active parameter
   has been replaced by *entity alternatives*.
   Entity classes have a default setting for the entity alternative called *active by default*.
+  Database migration should automatically replace tools, features and methods
+  by entity alternatives and set active by default to whatever default value `is_active`
+  or similar parameter had.
+  The `is_active` parameter is not removed from entity classes but its values are.
+- Note that new zero-dimensional entity classes have *active by default* set to `false` initially.
+  This means that the entities of those classes are hidden when using scenario filters
+  unless specifically shown using entity alternatives.
 
 #### Miscellaneous changes