diff --git a/src/ontology/mondo-edit.obo b/src/ontology/mondo-edit.obo
index b66e78bc59..d8e67fad52 100644
--- a/src/ontology/mondo-edit.obo
+++ b/src/ontology/mondo-edit.obo
@@ -200726,7 +200726,6 @@ name: angioedema
 def: "Swelling involving the deep dermis, subcutaneous, or submucosal tissues, representing localized edema. Angioedema often occurs in the face, lips, tongue, and larynx." [MESH:D000799]
 synonym: "angioedemas" EXACT [MESH:D000799]
 synonym: "angioneurotic edema" NARROW [DOID:1558, MESH:D000799]
-synonym: "angioneurotic edema" RELATED [DOID:1558]
 synonym: "angioneurotic Edemas" EXACT [MESH:D000799]
 synonym: "edema, angioneurotic" EXACT [MESH:D000799]
 synonym: "edema, Quincke's" EXACT [MESH:D000799]