Walters and Keane were at loggerheads after the then Ipswich striker was taken ill before a Carling Cup tie earlier this season.
"We had Exeter away and all during the week everybody in my family had a vomiting bug," Walters told The Sentinel.
"So I quarantined myself from the wife and kids to try and avoid it. But at 3am on the Tuesday morning I was throwing up too.
"I even took a picture of my sick and sent it to the physio because I knew Roy wouldn't believe me, what with it being a cup tie, clubs being interested in me and all that sort of thing.
"So I got the physio and doctor to smell my breath the next morning just after I'd been sick again.
"The next day I trained, even though I'd been wiped out. Then I got a text on Thursday night saying 'have you seen the papers?'. Roy had a pop at me, basically saying certain players were throwing one in.
"A day later, he brought me into the office, said I was going to be playing, but I didn't deserve to be captain because of my behaviour. Things got animated and he came out and told the papers my reaction was unbelievably overboard."