php - MySQL update 1 row of table, previous table is being updated -

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  $ sql = "set up paper paper $ field = '$ data' where paper_id and user_id = ''. $ _SESSION ['edit2'] "'";   
 I encountered a problem when I update the title (column in the paper table) for Paper_ID2; User_id 1 Paper_ID1; User_id 1 is also being updated  
 Can anyone give me an idea?   
 
 
 Try it:  
  $ sql =" set up paper $ field = '$ data' Please, where the paper_id = ". $ _ Request ['peppid']. / / * Comes from your request * / and user_id = '. $ _SESSION [' edit2 ']"' ";

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