This happened to me when I published two APKs (versions 3 and then 4) in a short space of time. Clicking "Deactivate" on the dropdown next to version 3 appeared to fix it.
My guess is that this is a very-poorly-worded error message meaning something like "your original APK hasn't been published to all the update servers yet, so some of them may miss that version entirely". But it's a bit of a guess.
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
