B1b2 expires on march 2019 reapply on feb 2020

b1b2 expires on march 2019 reapply on feb 2020 with very confidence because previous visa use very lawfully but refuse again.
try again with 2nd attempt after 5 months but refused as i already have canada valid business visitor till 2026. any guidance?

Sorry to head that,
what is the refusal reason mentioned on letter received after interview ?