Strange bufg with chart

[Digger]

NO data model will be provided (for thoose who not help but always asking for it ) 

I Have Line and Clustered column chart, as you can see Duration2 is not visible

but if i move durations in Line y-axis they become visible all

Also they become visible if i remove Year from column Legend

Why this hapens? and how to fix first chart to see both Column y-axis and Line y-axis?

[amitchandak]

@Digger , Can you enable the secondary y-axis and check, I doubt the two ranges are not in the same ranges and it showing on the same axis.

Also remove any min/max value used in y-axis and try

[Digger]

@amitchandak  secondary y-axis has not effect at all, nothing changes, all min/max values auto