librenms-librenms/sql-schema/166.sql

INSERT INTO config (config_name,config_value,config_default,config_descr,config_group,config_group_order,config_sub_group,config_sub_group_order,config_hidden,config_disabled) values ('webui.graph_type','png','png','Set the default graph type','webui',0,'graph',0,'0','0');