Lucknow, Aug 05 (ANI): As reports of SP leader Azam Khan being upset over relations of party Chief Mulayam Singh Yadav and former SP leader Amar Singh are doing rounds, Khan refuted any such claims. The SP leader said that he had some prior engagements due to which he could not attend the function but regrets the same. Mulayam and Amar Singh had parted ways in 2010 after a bitter political feud. After 4 years, Mulayam has now invited Singh to attend a mega event organized for the inauguration of a 367-acre park named in honour of former SP leader Janeshwar Mishra.