"Only a single foreign key constraint can be created on the same foreign key column(s) and same candidate key column(s)."
         
               
               
               
                  
                     | Item | 
                     Description | 
                  
               
               
                  
                     | 
                         SQLCode 
                      | 
                     
                         -1000165L 
                      | 
                  
                  
                     | 
                         Constant 
                      | 
                     
                         EMSG_SINGLE_FKEY_CONSTRAINT 
                      | 
                  
                  
                     | 
                         SQLState 
                      | 
                     
                         QNA34 
                      | 
                  
                  
                     | 
                         ODBC 2 State 
                      | 
                     
                         ERROR 
                      | 
                  
                  
                     | 
                         ODBC 3 State 
                      | 
                     
                         ERROR 
                      | 
                  
                  
                     | 
                         Sybase Error Code 
                      | 
                     
                         20825 
                      | 
                  
                  
                     | 
                         Severity Code 
                      | 
                     
                         
                           14
                         
                      | 
                  
               
            
 
         Probable cause
            
            For a given set of foreign key columns and candidate key columns,