Problem With @@IDENTITY In Stored Procedure

Hello !

I just can't access @@IDENTITY in my requests !
Here is my stored procedure : (I removed a few lines for clarity)set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[AssignerLicence]
(
@Apprenant int = 0
)
AS
BEGIN
SET NOCOUNT ON;

DECLARE @NBLICENCES int
DECLARE @COMMANDEID int
DECLARE @LICENCEID int

SET @NBLICENCES = (SELECT SUM(commande_licences_reste)
FROM Commande
WHERE commande_valide = 1)

IF
@NBLICENCES > 0
BEGIN

UPDATE Commande
SET commande_licences_reste = (commande_licences_reste - 1)
WHERE commande_id =
(SELECT TOP 1 C_min.commande_id
FROM Commande AS C_min
WHERE C_min.commande_licences_reste > 5
ORDER BY C_min.commande_licences_reste ASC,
C_min.commande_date ASC);

SET @COMMANDEID = @@IDENTITY

INSERT INTO Licence (licence_date_debut, commande_id)
VALUES (GETDATE(), @COMMANDEID)

SET @LICENCEID = @@IDENTITY

UPDATE Apprenant
SET licence_id = @LICENCEID
WHERE apprenant_id = @Apprenant

END

END

But it always throws an error saying that I can't insert null into commande_id (basically, I think @@IDENTITY isn't executed at all)

Any idea why it doen't works ?

Thanks !