When I've gone to clinicaltrials.gov over the past

When I've gone to clinicaltrials.gov over the past year I've seen the completion date of December 31, 2020 and have not really seen or maybe noticed that was a 'primary' completion date ... now I'm seeing another 'completion date' of April 1, 2021 (not sure I've noticed this date before)... I sure hope updates on the clinicaltrials.gov site start posting results .... some day soon

https://clinicaltrials.gov/ct2/show/results/NCT04347239

While this is the 'Study Details' and 'Tabular View' pages show the same dates.

Anyone have any knowledgeable idea about these dates and exactly what they may mean, please chime in....