diff --git a/reference/workflow.ttl b/reference/workflow.ttl
index a0afe0b4..9f022160 100644
--- a/reference/workflow.ttl
+++ b/reference/workflow.ttl
@@ -81,14 +81,6 @@ Workflows may also be extended reductionistically into serial and parallel workf
                                            skos:prefLabel "hasTaskTile"@en .
 
 
-###  https://w3id.org/emmo#EMMO_dbe39465_6cf4_4592_b0c5_b7446789a37b
-:EMMO_dbe39465_6cf4_4592_b0c5_b7446789a37b rdf:type owl:ObjectProperty ;
-                                           rdfs:subPropertyOf :EMMO_54d0d0f4_d9fa_4179_a9b5_4110c49dafff ;
-                                           rdf:type owl:SymmetricProperty ,
-                                                    owl:IrreflexiveProperty ;
-                                           skos:prefLabel "hasCollaborationWith"@en .
-
-
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