Sowakula, who made his debut in the series loss against Ireland, is replaced in the loose forwards by Shannon Frizell.
George Bower, Hoskins Sotutu and Sevu Reece are the Fijians named in the squad with Sam Cane retaining the captaincy.
The side plays South Africa in its opening match on August 7 at 3.05am.
Source:
FBC Sports