PhotonView ID duplicate found

Hi all, here is the problem,

I have 2 scenes, each scenes are in a specific room

when 2 players are in same scene, no problem.

One of them, player1 send a RPC who “instantiateSceneObject” called “hpGainEffectPrefab”…
ok

then this player1 leaves the scene/room, player2 stay in the room/scene
ok

BUT when player1 back in the scene, everything bug, and i got this message (cause of the instantiate gameObject) :

“PhotonView ID duplicate found: 14. New: View (0)14 on hpGainEffectPrefab(Clone) (scene) old: View (0)14 on hpGainEffectPrefab(Clone) (scene). Maybe one wasn’t destroyed on scene load?! Check for ‘DontDestroyOnLoad’. Destroying old entry, adding new.”

up

Someone knows about this problem ???