diff --git a/definitions/staging/stg_calls.sqlx b/definitions/staging/stg_calls.sqlx
index bea5057..fbb231c 100644
--- a/definitions/staging/stg_calls.sqlx
+++ b/definitions/staging/stg_calls.sqlx
@@ -4,7 +4,7 @@ config {
   schema: "pphe_five9_stg",  
   assertions: {
     uniqueKey: ["SESSION_ID", "TIMESTAMP", "DNIS"],
-    nonNull: ["SESSION_ID", "TIMESTAMP", "DNIS"]
+    nonNull: ["SESSION_ID", "TIMESTAMP"]
   },
   tags: ["calls"],
   description: "All history data for calls"