Why Salman Khan asked forgiveness to Katrina Kaif

Few days back Salman Khan came to Comedy Nights to promote his film 'Prem Ratan Dhan Payo' and said, 'Ye tho Mere Kaam Ki Bhi Nhi Thi'. This show was made on the theme on Diwali. Stalls of crackers and bombs were kept on the set. And on one of the packets there was Katrina's Photo. Salman was seen in a good mood on the set. Katrina But as soon as he say Katrina photo, he asked Kapil, is it necessary to paste her pic? Is it of any use to you? After sometimes Salman said, "It was not of my use also". Both of them started laughing on this comment. When Katrina got to know about it, she felt insulted and called Salman khan. Katrina told while giving interview to GQ India, "we work in same industry and he publicly hit jokes on me and even media highlights it. As he said on the set of Comedy Nights that "It was not of my use". Katrina said, "I called him and yelled at him, do we carry this kind of relation? After that he said, "Okay, Sorry, I will apologise to media. And I said not to do such things in future and possibly should remain respectfully silent.