Cannot view Global Configuration page 0 Error decoding JSON data: Syntax error - Joomla! Forum - community, help and support

hi,
i cannot view global configuration page in backend of client's site. receive 0 error decoding json data: syntax error .

i have followed instructions uploading json-db-check.php script, identified , fixed number of errors, problem remained. did next step check invalid values, , following error received:
checking table: chdg4_extensions, column params
row 23 not valid json. error: (syntax error)
content: {"filters":{"1":{"filter_type":"nh","filter_tags":"","filter_attributes":""},"9":{"filter_type":"bl","filter_tags":"","filter_attributes":""},"6":{"filter_type":"bl","filter_tags":"","filter_attributes":""},"7":{"filter_type":"none","filter_tags":"","filter_attributes":""},"2":{"filter_type":"nh","filter_tags":"","filter_attributes":""},"3":{"filter_type":"bl","filter_tags":"","filter_attributes":""},"4":{"filter_type":"bl","filter_tags":"","filter_attributes":""},"5":{"filter_type":"bl","filter_tags":"","filter_attributes":""},"8":{"filter_type":"none","filter_tags":"","filter_attributes":""}},}}}

i followed instructions, , put error http://jsonlint.com/ check error is, don't know json , there wasn't example, i'm not sure if i'm supposed include content: @ beginning?
content: {"filters":{"1":{"filter_type":"nh","filter_tags":"","filter_attributes":""},"9":{"filter_type":"bl","filter_tags":"","filter_attributes":""},"6":{"filter_type":"bl","filter_tags":"","filter_attributes":""},"7":{"filter_type":"none","filter_tags":"","filter_attributes":""},"2":{"filter_type":"nh","filter_tags":"","filter_attributes":""},"3":{"filter_type":"bl","filter_tags":"","filter_attributes":""},"4":{"filter_type":"bl","filter_tags":"","filter_attributes":""},"5":{"filter_type":"bl","filter_tags":"","filter_attributes":""},"8":{"filter_type":"none","filter_tags":"","filter_attributes":""}},}}}

this http://jsonlinet.com/ returned:
error: parse error on line 1:
content: { "filters
^
expecting 'string', 'number', 'null', 'true', 'false', '{', '[', got 'undefined'

what supposed information? how know fix is, , where/how apply it?

is there can me this?
thanks

you should take including {}.