Hello Kapil 
Than you again for you response i'm so thankful
So to summarize, i checked in table BSPC_DL_PERSSTOR :
In developpement client i have those entries :
In test client i have those entries :
So if i inderstood i have to run report BSP_DLC_DELETE_PERSONALIZATION by my user in test client in order to delete which one ? because i'm afraid to delete a personalisation by mistake 
Hasnaa .