replace error 0x8007042b

Hi people.
win 10 model 1809 construct 17763.864
attempted to replace characteristic replace to win 10 model 1909 and after 3 plus hours I discovered I used to be again the place I began.
at the replace historical past it says remaining failed set up strive on 5122019 – 0x8007042b
above that Feature replace to Windows 10, model 1909 (2)
and no different data. Up to then all used to be up-to-the-minute
so any concepts please