Prop Graham Rowntree has admitted the Lions made late changes to their line-out just days before it fell apart in the first Test against New Zealand. The move was made as Lions coaches feared that New Zealand had worked out their line-out codes.
But the changes did not help the Lions as they went on to lose eight of their own throws in the 21-3 defeat.
"We thought the All Blacks had cracked our line-out code, so we changed a few things," said Rowntree.
"In hindsight, that was suicide."
Lions head coach Sir Clive Woodward blamed the failure of the set-piece for the loss in Christchurch and said afterwards: "We lost because we did not get enough ball from the line-out."
Lock Paul O'Connell, who was given a torrid time by opposite number Chris Jack, admitted that he was not happy with the new calls.
"We had a combination of problems, poor execution in lifting, a few missed calls," he said in his column for The Independent newspaper.
"The All Blacks had so much time together. They had our number. I was disappointed with the new line-out calls."
Woodward has tried to solve the line-out problems by naming a revamped pack for the second Test in Wellington on Saturday.
Hooker Shane Byrne drops to the bench to make way for Steve Thompson, lock Donncha O'Callaghan comes in for Ben Kay and open-side flanker Lewis Moody will provide another jumping option.
Simon Easterby is named at blind-side flanker while Ryan Jones replaces Martin Corry at number eight.