Related to https://answers.atlassian.com/questions/43719532
I think I've determined that all important filters use "Rank" so I want to delete the other two. Would re-inserting the row in the customfield, fieldconfiguration, and configurationcontext tables be sufficient to rollback if needed?
In query form, these rows:
select *
from configurationcontext cc, fieldconfiguration fc, customfield cf
where cc.customfield = fc.fieldid
and fc.fieldid = concat('customfield_', cf.ID)
and cf.ID = <id to be deleted>