High School Why is Maldacena's paper published in two journals?

[Demystifier]

The famous Maldacena's paper, the first paper on what is today called AdS/CFT correspondence, is published in two journals. It's not two parts of one work, it's one complete paper published twice. I presume that there is some interesting story behind it, but I don't know it. Does anybody know the story, why is it published in two journals?
https://inspirehep.net/literature/451647

Jokes, like the two journals are dual to each other, are also welcome, but I'm primarily interested in the true reason.

 

[Vanadium 50]

Have you asked Juan?

I am amused that one of them wants $39.95 to read the article, and the other gives it away for free,

 

[Demystifier]

Have you asked Juan?

No, I presume that he does not have time to answer trivial questions asked by unknown mortals.

 

[Vanadium 50]

I dunno...I first "met" him when I cold-called him to get him to serve on a committee. Which he did.

 

[berkeman]

I dunno...I first "met" him when I cold-called him to get him to serve on a committee. Which he did.

But you are neither unknown nor mortal. Just sayin'

 

[Demystifier]

But you are neither unknown nor mortal. Just sayin'

And his request was not trivial.

 

[Vanadium 50]

There is a paradox that asking someone for a lot of help is more likely to generate a positive response than asking them for a little.

 

[Vanadium 50]

When looking at contemporary issues of Adv.Theor.Math.Phys I see a number of papers by Ed Witten. There may be some history behind this unusual double-publication.

 

[russ_watters]

Jokes, like the two journals are dual to each other, are also welcome...

It's spelled d-u-e-l.

 

[LCSphysicist]

But you are neither unknown nor mortal. Just sayin'

Now i am curious who Vanadium is!

 

[berkeman]

I could tell you, but, well, you know...

 

[berkeman]

Now i am curious who Vanadium is!

Are you familiar with the Batman movies?

 

[LCSphysicist]

Are you familiar with the Batman movies?

Just the ones after 2000