In a letter to staff, made public on Monday, Mr Ashley said the centre needed improvements to its security procedures, which had now been made.
The retailer has been criticised for the centre's working conditions.
Mr Ashley said chief executive Dave Forsey would also not receive his £4m bonus due to the "difficult year".
The Newcastle United owner is due to appear before the Business, Innovation and Skills select committee later.
Mr Ashley had previously refused to face MPs, but on Sunday he decided that he would give evidence to defend the firm's "good name".
The billionaire had urged MPs to visit the …show more content…
Six strikes policy
A BBC investigation last year found ambulances were called out to Sports Direct's complex at Shirebrook, in Derbyshire, 76 times in two years.
Former workers said some staff were "too scared" to take sick leave because they feared losing their jobs.
Sports Direct said at the time it aimed to provide safe working conditions for all.
Shares in Sports Direct have fallen 45% in the past 12 months amid falling sales and a barrage of negative publicity.
Independent retail analyst Nick Bubb commented: "The reason Mike Ashley is normally kept away from the press is that he speaks his mind too freely, so it will be interesting to see if the MPs goad him into letting his guard slip."
Select committee chairman Iain Wright said he looked forward to Mr Ashley responding to the "serious allegations".
Failure to appear in front of MPs meant Mr Ashley had risked being found in contempt of Parliament.
"As a committee, we want to get a sense of the genuine and balanced picture at Sports Direct and establish whether there are issues for the wider economy which need further examination, such as the status and rights of agency workers," Mr Wright