Clean Aperature flag introduced on SD content exports

[#1]

Hi there,

I was hoping for some assistance please, we're exporting SD 720x576 ProRes 422 HQ content (flagged as D1/DV PAL Widescreen 16:9 1.4587) and when checking the content after export a clean aperature flag and non-standard display aspect ratio is being advised:

Clean Aperature width: 703 pixels. 

Display Aspect Ratio: 1.85:1

I know this used to be something you'd have to remove with FCP back in 2010, but is there a way to remove this flag within Premiere? JES is no longer supported on macs.

Any advice appreciated. 

Thanks!