Thank for info I have checked new release and it really solve the problem with upgrading from 1.4.0 to 1.5.0 ( https://lists.apache.org/thread/jg4s21f3kotqvbnvqqhvdqcsdr88zwwh ). Upgrade from 1.4.0 to 1.5.1 successfully.
However, one question: why latest still has problem with upgrading? It may be issue for next release. Alexandre
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