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  • Yes, but is this really the source of trouble here? I have skipped one or two leaps several times without running into problems like this. Commented Jan 1, 2021 at 22:24
  • I don't know if that's the source of the trouble or not. But, the vendor recommends against it. It might be interesting to find out why they recommend against it - most likely because the upgrade procedure makes certain assumptions about the contents of the system being upgraded, or because they've never tested the 15.0 -> 15.2 upgrade. Commented Jan 2, 2021 at 23:33