using sen2cor to convert TOA product into BOA product in sentinel 2A image from 2016 February

I am able to run using sen2cor 2.5 version, my concern is that i have now that data for 2018, 2019 and 2020 is processes with 2.8 where as older data is processed using 2.5 version.

i am not clear is it ok to have data with processed with different version of sen2cor, as the correction applied in 2.8 is better than 2.5

we have already processed a large amount of data for 2018, 2019 and 2020, 2021, we are going back to 2017, 2016, and 2015 ( where we hit this issue )