RoR issue in browser stats app, can’t create record due to field missing

Page for update to db table for 'operating_systems' not working, could not figure it out initially as the model, view and controller are all similar to the code used for browser_version. Finally realized that the database itself (and of course rails trying to adjust dynamically, but the view lacking such a named field) had somehow gained an additional NN field for 'os_sources_id' (sources-plural) in addition to the existing 'os_source_id' field(source-singular):eek: Just one letter difference and kinda hard-to-spot! Made the error message quite misleading!

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