diff --git a/db/routines/vn/procedures/invoiceIn_booking.sql b/db/routines/vn/procedures/invoiceIn_booking.sql
index c728085b8..a5dd3a5f1 100644
--- a/db/routines/vn/procedures/invoiceIn_booking.sql
+++ b/db/routines/vn/procedures/invoiceIn_booking.sql
@@ -16,9 +16,11 @@ BEGIN
 	DECLARE vHasRepeatedTransactions BOOL;
 
 	SELECT TRUE INTO vHasRepeatedTransactions
-		FROM invoiceInTax
-		WHERE invoiceInFk = vSelf
-		HAVING COUNT(DISTINCT transactionTypeSageFk) > 1
+		FROM invoiceInTax iit
+			JOIN invoiceIn ii ON ii.id = iit.invoiceInFk
+		WHERE ii.id = vSelf
+			AND ii.serial = 'E'
+		HAVING COUNT(DISTINCT iit.transactionTypeSageFk) > 1
 		LIMIT 1;
 
 	IF vHasRepeatedTransactions THEN