post xxx already exists error message

I am now getting a “post xxx already exists” error message. attempted to add the “post_exists = false” suggestion but hostgator says that because this was for an older wordpress version it doesnt work on this one (tried & did nothing). anyong else getting this error? have a how to fix suggestion? would greatly appreciate it! this relocation into www.remarpro.com is turning out the be the hardest transport in history.