RTC Backend - Bulk Update - Stinglist formatted attributes

Hi

In one of my Project areas I have a requirement of updating multiple work items via CSV formatted data.

However, the bulk update doesn't go through for two attributes which formatted under String-List.

Q1 - Can I update String-list formatted attributes via bulk

Q2 - If bulk update is possible, is there any specific format I should use, when updating such attributes.

Appreciate your help.

Thanks

DK