diff --git a/src/ontology/imports/local-cteno.owl b/src/ontology/imports/local-cteno.owl
index 6b50117eb0..d019a013ec 100644
--- a/src/ontology/imports/local-cteno.owl
+++ b/src/ontology/imports/local-cteno.owl
@@ -12857,12 +12857,6 @@
     
 
 
-    <!-- http://purl.obolibrary.org/obo/UBERON_0006846 -->
-
-    <owl:Class rdf:about="http://purl.obolibrary.org/obo/UBERON_0006846">
-        <rdfs:subClassOf rdf:resource="http://purl.obolibrary.org/obo/UBERON_0003102"/>
-        <rdfs:label rdf:datatype="http://www.w3.org/2001/XMLSchema#string">surface groove</rdfs:label>
-    </owl:Class>
     
 
 
diff --git a/src/ontology/imports/local-ehdaa2.owl b/src/ontology/imports/local-ehdaa2.owl
index 9400641d14..5afe4ae16e 100644
--- a/src/ontology/imports/local-ehdaa2.owl
+++ b/src/ontology/imports/local-ehdaa2.owl
@@ -25905,7 +25905,6 @@ SubClassOf(<http://purl.obolibrary.org/obo/EHDAA2_0004738> ObjectSomeValuesFrom(
 AnnotationAssertion(rdfs:label <http://purl.obolibrary.org/obo/EHDAA2_0004739> "extraembryonic coelum"^^xsd:string)
 SubClassOf(<http://purl.obolibrary.org/obo/EHDAA2_0004739> <http://purl.obolibrary.org/obo/AEO_0000221>)
 SubClassOf(<http://purl.obolibrary.org/obo/EHDAA2_0004739> ObjectSomeValuesFrom(<http://purl.obolibrary.org/obo/RO_0001025> <http://purl.obolibrary.org/obo/EHDAA2_0000472>))
-SubClassOf(<http://purl.obolibrary.org/obo/EHDAA2_0004739> ObjectSomeValuesFrom(<http://purl.obolibrary.org/obo/RO_0002371> <http://purl.obolibrary.org/obo/EHDAA2_0000267>))
 SubClassOf(<http://purl.obolibrary.org/obo/EHDAA2_0004739> ObjectSomeValuesFrom(<http://purl.obolibrary.org/obo/RO_0002496> <http://purl.obolibrary.org/obo/HsapDv_0000016>))
 
 # Class: <http://purl.obolibrary.org/obo/EHDAA2_0004740> (urogenital sinus epithelium vesical part)
@@ -26330,4 +26329,4 @@ AnnotationAssertion(<http://purl.obolibrary.org/obo/IAO_0100001> <http://purl.ob
 AnnotationAssertion(owl:deprecated <http://purl.obolibrary.org/obo/ZFA_0001690> "true"^^xsd:boolean)
 
 
-)
\ No newline at end of file
+)
diff --git a/src/ontology/uberon-edit.obo b/src/ontology/uberon-edit.obo
index 9b6a1ff8a4..d806382e30 100644
--- a/src/ontology/uberon-edit.obo
+++ b/src/ontology/uberon-edit.obo
@@ -106778,9 +106778,7 @@ id: UBERON:0005906
 name: serous sac
 def: "Organ with organ cavity, which has as parts a serous membrane and a serous cavity . Examples: pleural sac, pericardial sac, tendon sheath, bursa.[FMA]." [FMA:9689, https://github.com/obophenotype/uberon/issues/86]
 comment: See notes for serous membrane
-xref: EMAPA:16060
 xref: FMA:9689
-xref: MA:0000005
 xref: SCTID:362890006
 is_a: UBERON:0000062 ! organ
 relationship: has_part UBERON:0000042 ! serous membrane