Why is there a mismatch between the historical data I download now w.r.t. the same data downloaded t

Hi, a couple of years ago I downloaded through the Eikon Python API daily close/open prices for a list of stocks and ETFs for the period 1998-2018. Now I tried to re-download the same data, and I see significant differences in prices. Why does it happen, and which of the two datasets should I trust? Is it possible to know when, why and how often Eikon updates its data?

Best Answer