diff --git a/doc/classes/AnimationLibrary.xml b/doc/classes/AnimationLibrary.xml
index d457a858ab9..7f87ea4616e 100644
--- a/doc/classes/AnimationLibrary.xml
+++ b/doc/classes/AnimationLibrary.xml
@@ -54,10 +54,6 @@
 			</description>
 		</method>
 	</methods>
-	<members>
-		<member name="_data" type="Dictionary" setter="_set_data" getter="_get_data" default="{}">
-		</member>
-	</members>
 	<signals>
 		<signal name="animation_added">
 			<param index="0" name="name" type="StringName" />
diff --git a/scene/resources/animation_library.cpp b/scene/resources/animation_library.cpp
index a69b1818d28..436bf88ec95 100644
--- a/scene/resources/animation_library.cpp
+++ b/scene/resources/animation_library.cpp
@@ -154,7 +154,8 @@ void AnimationLibrary::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("_set_data", "data"), &AnimationLibrary::_set_data);
 	ClassDB::bind_method(D_METHOD("_get_data"), &AnimationLibrary::_get_data);
 
-	ADD_PROPERTY(PropertyInfo(Variant::DICTIONARY, "_data", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NO_EDITOR), "_set_data", "_get_data");
+	ADD_PROPERTY(PropertyInfo(Variant::DICTIONARY, "_data", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NO_EDITOR | PROPERTY_USAGE_INTERNAL), "_set_data", "_get_data");
+
 	ADD_SIGNAL(MethodInfo("animation_added", PropertyInfo(Variant::STRING_NAME, "name")));
 	ADD_SIGNAL(MethodInfo("animation_removed", PropertyInfo(Variant::STRING_NAME, "name")));
 	ADD_SIGNAL(MethodInfo("animation_renamed", PropertyInfo(Variant::STRING_NAME, "name"), PropertyInfo(Variant::STRING_NAME, "to_name")));