'mistakenly-updated' is a compound word formed from 'mistakenly' and 'updated'. 'Mistakenly' originates from 'mistake', which comes from Old Norse 'mistaka', meaning 'to take in error'. 'Updated' comes from 'update', which is derived from 'up' and 'date', meaning 'to bring up to date'.

'Mistakenly' evolved from the Old Norse 'mistaka', while 'updated' evolved from the combination of 'up' and 'date' in modern English.

Initially, 'mistakenly' meant 'in error', and 'updated' meant 'brought up to date'. The compound 'mistakenly-updated' retains these meanings, indicating an update made in error.