diff --git a/src/ontology/uberon-edit.obo b/src/ontology/uberon-edit.obo
index 66985799e..37a45d5ec 100644
--- a/src/ontology/uberon-edit.obo
+++ b/src/ontology/uberon-edit.obo
@@ -61071,7 +61071,6 @@ xref: FMA:72595
 xref: HBA:265504914
 xref: neuronames:756 {source="BIRNLEX:2638"}
 xref: UMLS:C0262207 {source="BIRNLEX:2638"}
-xref: ZFA:0000518
 intersection_of: UBERON:0035011 ! central gray substance
 intersection_of: part_of UBERON:0001896 ! medulla oblongata
 relationship: part_of UBERON:0001896 {source="FMA"} ! medulla oblongata