Only if you feel the decrypt isn't obvious on review. As an exmaple, if I encrypted Tracker with "I love mafia" by simple letter to number conversion and addition, it doesn't really need clues or hints, but its still a good idea. If you encrypted it with 3561749057 (some random number string I just created by mashing my number pad) then yeah, definitely redo it, because it leaves you open to accusation of reverse-engineering a key after you've seen other's RC's. If people want to avoid using a word, then they need a patterned number of some sort - time stamp, post number, the first ten digits of a physical constant, etc. But in these days of google, searching a number string you create to find something that makes it meaningful and thus believable isn't too hard, so the codes are really best if something conclusively hinting at the key is used. All that matters is that everyone else can be reasonably satisfied you didn't reverse-engineer your key, so like someone's telephone number as the key is a real bad choice, unless its a distinct and meaningful one beyond doubt, like the White House Switchboard as opposed to Bob's Liquor Store in Jersey, since that would just look like you found a sequence of numbers (very easy, should take someone only a couple minutes) that makes your code say what you want it to then found something that connected to it. You can use something really arcane like the first 10 digits of the speed of light as given in inches per fortnight but then you really need to include in the message you give your code some reference to inch, light, and fortnight, like "We keep inching along, I don't like days taking two weeks, it seems a big waste of time since we just end up killing a lightsider anyway, not that I'm suggesting we try to move at lightspeed or something but we need to pick up the pace a bit" and so on.

So, its your judgement call to make, if you feel your code will be highly credible as is, leave it be, if not, or if in doubt, redo, or even just post a reply and encrypt your previous key this way instead of your role name. Probably a longer answer than you needed, but I figured I might as well go into depth for everyone.