diff --git a/generated/jsonschema/allianceModel.schema.json b/generated/jsonschema/allianceModel.schema.json
index 13ecf5dce..0ed1856c5 100644
--- a/generated/jsonschema/allianceModel.schema.json
+++ b/generated/jsonschema/allianceModel.schema.json
@@ -22205,7 +22205,10 @@
                 },
                 "current_version": {
                     "description": "The current version of the entity, generated by this nomenclature event. It starts at one, and is incremented by one with every major change.",
-                    "type": "integer"
+                    "type": [
+                        "integer",
+                        "null"
+                    ]
                 },
                 "date_created": {
                     "description": "The date on which an entity was created. This can be applied to nodes or edges.",
@@ -22241,7 +22244,10 @@
                 },
                 "event_status": {
                     "description": "Status for an event change: provisional or approved.",
-                    "type": "string"
+                    "type": [
+                        "string",
+                        "null"
+                    ]
                 },
                 "event_type": {
                     "description": "Category of major change event for an entity.",
@@ -22352,8 +22358,6 @@
             "required": [
                 "single_gene",
                 "event_type",
-                "event_status",
-                "current_version",
                 "internal"
             ],
             "title": "GeneChangeEventSlotAnnotation",
@@ -22382,7 +22386,10 @@
                 },
                 "current_version": {
                     "description": "The current version of the entity, generated by this nomenclature event. It starts at one, and is incremented by one with every major change.",
-                    "type": "integer"
+                    "type": [
+                        "integer",
+                        "null"
+                    ]
                 },
                 "date_created": {
                     "description": "The date on which an entity was created. This can be applied to nodes or edges.",
@@ -22418,7 +22425,10 @@
                 },
                 "event_status_name": {
                     "description": "Name of the VocabularyTerm describing the status of an event change: provisional or approved.",
-                    "type": "string"
+                    "type": [
+                        "string",
+                        "null"
+                    ]
                 },
                 "event_type_name": {
                     "description": "Name of the VocabularyTerm describing the category of major change event for an entity.",
@@ -22521,8 +22531,6 @@
             "required": [
                 "gene_identifier",
                 "event_type_name",
-                "event_status_name",
-                "current_version",
                 "internal"
             ],
             "title": "GeneChangeEventSlotAnnotationDTO",
diff --git a/model/schema/core.yaml b/model/schema/core.yaml
index 0830b499e..dc45aa329 100644
--- a/model/schema/core.yaml
+++ b/model/schema/core.yaml
@@ -411,6 +411,11 @@ classes:
       - symbol_renamed_from
       - full_name_renamed_to
       - full_name_renamed_from
+    slot_usage:
+      event_status:
+        required: false
+      current_version:
+        required: false
 
   ChangeEventSlotAnnotationDTO:
     is_a: SlotAnnotationDTO
@@ -431,6 +436,11 @@ classes:
       - symbol_renamed_from
       - full_name_renamed_to
       - full_name_renamed_from
+    slot_usage:
+      event_status_name:
+        required: false
+      current_version:
+        required: false
 
   Association:
     is_a: AuditedObject
@@ -1096,7 +1106,6 @@ slots:
       Status for an event change: provisional or approved.
     range: VocabularyTerm
     multivalued: false
-    required: true
 
   event_status_name:
     description: >-
@@ -1104,7 +1113,6 @@ slots:
       provisional or approved.
     range: string
     multivalued: false
-    required: true
 
   current_version:
     description: >-
@@ -1112,7 +1120,6 @@ slots:
       It starts at one, and is incremented by one with every major change.
     range: integer
     multivalued: false
-    required: true
 
   acquires_in_merge:
     description: >-