Bloke it is not an error because it happens a little to often. It is simply left over shorts which were not covered on the day they were sold. Then covered the next day.
Week 46 Wrap: Copper hits 2mth low as Trump threatens net zero pace; US rally fades; HotCopper’s picks
AN1 CuFe sells its Crossroads gold royalty to Northern Star for $4M cash; says better than waiting for mine launch