diff --git a/definitions/staging/stg_calls.sqlx b/definitions/staging/stg_calls.sqlx
index fa10de8..b9ee5c2 100644
--- a/definitions/staging/stg_calls.sqlx
+++ b/definitions/staging/stg_calls.sqlx
@@ -9,8 +9,15 @@ config {
   tags: ["calls"],
   description: "All history data for calls"
 }
-    
-select  DAY_OF_WEEK,
+  
+with calls_deduplicated as (
+select  *,
+        ROW_NUMBER()
+          OVER (PARTITION BY SESSION_ID, TIMESTAMP, DNIS)
+          row_number
+from ${ref("calls_*")}
+${ when(incremental(), `where _TABLE_SUFFIX = FORMAT_DATE('%Y%m%d',current_date("Europe/Amsterdam"))`) })
+select DAY_OF_WEEK,
         CALL_ID,
         CAMPAIGN,
         SKILL,
@@ -209,5 +216,5 @@ select  DAY_OF_WEEK,
         Social_Category SOCIAL_CATEGORY,
         Social_socialId SOCIAL_SOCIALID,
         Studio_transfer_disposition STUDIO_TRANSFER_DISPOSITION
-from ${ref("calls_*")}
-${ when(incremental(), `where _TABLE_SUFFIX = FORMAT_DATE('%Y%m%d',current_date("Europe/Amsterdam"))`) }
\ No newline at end of file
+from calls_deduplicated
+where row_number = 1
\ No newline at end of file