diff --git a/ontology/CASE-unstable-2.0.0.ttl b/ontology/CASE-unstable-2.0.0.ttl
index 1162e39d..b3bea87d 100644
--- a/ontology/CASE-unstable-2.0.0.ttl
+++ b/ontology/CASE-unstable-2.0.0.ttl
@@ -2910,7 +2910,7 @@ core:UcoInherentCharacterizationThing
 
 core:UcoInherentCharacterizationThing-disjointWith-UcoObject-shape
 	a sh:NodeShape ;
-	sh:message "observable:UcoInherentCharacterizationThing and observable:UcoObject are disjoint classes."@en ;
+	sh:message "core:UcoInherentCharacterizationThing and core:UcoObject are disjoint classes."@en ;
 	sh:not [
 		a sh:NodeShape ;
 		sh:class core:UcoObject ;