Can't execute query

insert into web_download_count 
                           set 
                                lang_type      = 'tw', 
                                file_id        = 136,
                                p_name         = 'X Box 360 to X Box One',
                                dc_id          = ,
                                dc_name        = '������',
                                IP_address     = '3.145.203.23',
                                user_device    = 0,
                                user_info      = 'claudebot',
                                o_name         = 'Xbox360toXboxOne_Manual_20180302V1.pdf',
                                ser_name       = '1812268441.pdf',
                                sport          = 0,
                                version        = '',
                                download_type  = 1,
                                download_time  = '2024-04-18 09:12:41'

MySQL Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ' dc_name = '������', ' at line 6

This script cannot continue, terminating.