diff --git a/1.RASD/res/alloy/AlloyPowerEnjoy.als b/1.RASD/res/alloy/AlloyPowerEnjoy.als
index 933172e..043a87c 100644
--- a/1.RASD/res/alloy/AlloyPowerEnjoy.als
+++ b/1.RASD/res/alloy/AlloyPowerEnjoy.als
@@ -297,7 +297,9 @@ fact  noMultipleUsersForTheSameRequest {
 
 // The same Request cannot be performed by two different User
 fact noDifferentUserForTheSameRequest {
-		all r : RMSS | r in r.user.request
+		(all u1, u2 : User | u1 != u2 implies
+			(no r : RMSS | r in u1.request and r in u2.request)
+		)
 }
 
 // The same User cannot have two ACTIVE Requests