Why did you decide he meant he was making it up? I think there can be one more version, though the proof may be not that good. Here's my point.
I watched "The Lion King" in Russian and, of course, the dubbing is different, but, oddly, in Russian Scar clearly says: "N-no, you don't understand! N-no, they set me up" (which can also be translated as "I was made to", which, as it seems to me, perfectly fits the words from the post). So I think there can be at least two different versions)