The 30-year-old was involved in a training ground bust-up with his former Manchester City team-mate in 2007 but has now invited him to discuss the matter over dinner
The Huyton-born midfielder was handed a four-month suspended sentence for his part in a fight at City's training ground in 2007 which left Dabo with a detached retina.
The now-retired Frenchman reignited their spat after the 30-year-old sealed a deadline day loan move to Marseille on Friday, describing Barton as a "coward".
However, the QPR man has hit back at the accusations, insisting that he would happily speak to the 35-year-old about the matter over dinner.
"I see Dabo is yet to move on, I feel for him," he posted on his official Twitter account. "What happened was unfortunate. Next time he should think twice about throwing his weight about.
"Thats all I have to say about this chap. I have moved on.
"If Ousmane wants to come to a Marseille game, have dinner and discuss it like adults, he's more than welcome anytime. For me now, its over!"
Barton is currently serving a 12-match ban after he engaged in violent conduct following a straight red card against Manchester City on the final day of last season.
And he revealed that his temporary move to France will not get around the ban, admitting he is unsure over when he will be able to play his first game for the Ligue 1 club.
He said on his website: "In case you wanted to know the ban from the English FA still stands in France, this means my first league game is sometime in November (I’m not 100% sure exactly just yet)."
Central defender Stephane M'bia has moved to Loftus Road as part of the deal which took the former Newcastle man to France, in one of many summer signings by Mark Hughes.
And Barton moved to wish the club well in their Premier League campaign, before hailing the summer additions made by Hughes.
He added: "Good luck to everyone at QPR for this season, they’ve made some great signings for the club – what would you expect of Mark Hughes backed by quality owners. Not least Mbia who was somebody that I initially looked forward to playing alongside at Marseille.
"Let’s not forget that I’m a contracted QPR player for two more years after this loan ends – who knows about my QPR future a year from now."