Was it fair to void the 6 overs total runs for KKR when they chased their total of 66 in five overs?

Surely the rules should be changed so that either team winning the match before the six overs are bowled does not void the market? The current rules are against the spirit of betting as exemplified by the following scenario: Team batting first scores 150 in 20 overs. Team batting second replies with 26 sixes in a row. Bets that the second team would score more than 60 in their six overs would be voided as rules stand, which is absurd.