[Fizzlemizz]

You could just change

CRE_GuildRoster = {
    {

to

CRE_GuildRoster = {
    ["Players"] = {

in the SavedVariables file (your addon will need to be ready for the change next login):

or for a an already distributed addon:

local function CopyTable(src, dest)
    for index, value in pairs(src) do
        if (type(value) == "table") then
            dest[index] = {};
            DL_Copy_Table(value, dest[index]);
        else
            dest[index] = value;
        end
    end
end
    
CRE_GuildRoster.Players = {}
CopyTable(CRE_GuildRoster[1], CRE_GuildRoster.Players)
tremove(CRE_GuildRoster, 1)

That should copy all the entries from [1] to ["Players"] even if you have more entries than just ["Noxis"].

It doesn't account for having tables other than [1] with information to be transfered.

While testing, you could do the tremove(CRE_GuildRoster, 1) seperately after you've logged out and verified the information has been copied (make backups of your Saved Variables file first)