Valerie Adams said the Olympic registration issue which nearly cost her a chance to compete at the London Games 'screwed her up mentally'.
But the Olympic silver medallist - who lost for the first time in 27 competitions - said the mistake was not completely to blame for her 'disappointing' performance.
The night before Adams was due to compete she noticed her name was not included in the shotput competition online. The error was corrected and Adams received her competition bib just hours before stepping in to the stadium.
"I'm very sorry it happened, it was very scary," she told Tony Veitch on Radio Sport today.
"Mentally it had an affect on me, other athletes at the village were asking me why I wasn't on the start list. All I could say was I'm not sure, I'm not sure."