I signed up for Apple ID and Apple Support Communities separately. Can I merge the two accounts?

I signed up for an "Apple ID" and an "Apple Support Communities username" separately using the same e-mail address. Is there any way to merge the two accounts?

I signed up for "Apple Support Communities" several years ago to get help with Apple products. I then signed up for an "Apple ID" later on to buy stuff at the iTunes Store.

I was trying to access "Apple Support Communities" using my Apple ID and I get prompted to choose a username. But when I type my current username, it says the username is already taken. Alternatively, if I try to choose a new username to go along with my Apple ID, I get a message saying that there is a username already assigned to my e-mail address.

For some reason, "Apple Support Communities" is not intuitively syncing the two accounts together despite the fact that they are linked to the same e-mail address.

I don't want to cancel either of these accounts since I have activities using one/the other that I do want to preserve.

Can anyone help me merge these two accounts together?

Thanks.