diff --git a/openapi.yaml b/openapi.yaml
index 0fd7a5c..49620bb 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -10001,6 +10001,7 @@ components:
             - $ref: '#/components/schemas/se_id'
           description: A string that uniquely identifies the warehouse
         submission_id:
+          nullable: true
           readOnly: true
           type: string
           minLength: 1