first mistake

I HAVE AN ISSUE AT WORK AND I HAVE BEEN ASKED TO GO FOR QUESTIONING AT ###. I KNOW WHAT EVER ACCUSATION IT IS MAY BE TRUE BUT GOD KNOWS THAT WAS NOT DONE DELIBERATELY AND THAT IS THE FIRST MISTAKE OF SUCH KIND I HAVE MADE IN MY CAREER OF ### YEARS. I KNOW THAT IN WHAT IS HAPPENING THERE IS A BIT...