Appears to be the cancellation of 550,000 in options; granted on Feb 5, 2019. See on Sedar - June 27th Notice of the AGM including the Management Information Circular - page 11. Not sure why they were canceled given the expiry was in 2024. Maybe freeing up Options for the CEO position. Just a shot in the dark guess.
He still has 1,000,000 options at an exercise price of $0.35 (2023 expiry) and 33M shares.