diff --git a/docs/release_notes/issue1191-add-Assignment-class.md b/docs/release_notes/issue1191-add-Assignment-class.md
index 22a8bb6f..0df7d86f 100644
--- a/docs/release_notes/issue1191-add-Assignment-class.md
+++ b/docs/release_notes/issue1191-add-Assignment-class.md
@@ -1,3 +1,3 @@
 ### Minor Updates
 
-- Added `gist:Assignment` class and corresponding object properties: `gist:isAssignmentOf`, `gist:isAssignmentTo`, and `gist:isAssignedBy`. Issue [#1191](https://github.com/semanticarts/gist/issues/1191).
+- Added `gist:Assignment` class and corresponding object properties: `gist:isAssignmentOf` and `gist:isAssignmentTo`. Issues [#1191](https://github.com/semanticarts/gist/issues/1191), [#1223](https://github.com/semanticarts/gist/issues/1223).
diff --git a/ontologies/gistCore.ttl b/ontologies/gistCore.ttl
index cd36d2ea..20f81801 100644
--- a/ontologies/gistCore.ttl
+++ b/ontologies/gistCore.ttl
@@ -209,7 +209,7 @@ gist:Assignment
 			gist:TemporalRelation
 			[
 				a owl:Restriction ;
-				owl:onProperty gist:isAssignedBy ;
+				owl:onProperty gist:hasGiver ;
 				owl:someValuesFrom owl:Thing ;
 			]
 			[
@@ -2945,23 +2945,6 @@ gist:isAllocatedBy
 		;
 	.
 
-gist:isAssignedBy
-	a owl:ObjectProperty ;
-	skos:definition "Relates an assignment to the assigner."^^xsd:string ;
-	skos:example "An employee is assigned to a task by a supervisor."^^xsd:string ;
-	skos:prefLabel "is assigned by"^^xsd:string ;
-	skos:scopeNote
-		"Due to the Open World Assumption, the assigner may not be known or asserted."^^xsd:string ,
-		"The assigner is typically a person, organization, or software system."^^xsd:string ,
-		"While typically this predicate will be used with gist:Assignment subjects, there may be other use cases and therefore a domain is not specified."^^xsd:string
-		;
-	gist:domainIncludes gist:Assignment ;
-	gist:rangeIncludes
-		gist:Organization ,
-		gist:Person
-		;
-	.
-
 gist:isAssignmentOf
 	a owl:ObjectProperty ;
 	skos:definition "Relates an assignment to the resource it assigns."^^xsd:string ;