I bought BF1 on steam accidentally logged into Origin account i dont use.

Oh ok, so since BF1 is bought through steam it's linked to it, and i can use any EA account i want but if i link steam with another EA acc i lose all the progress. I think i understand how it works now.

In that case no harm done if i lose progress, haven't made much of it so far.

Thank you so much. Will do what you advised me later and let you know.