This is the 2832nd most frequent Korean word.
있으나
"있으나" means "though there is" or "although there is."
Here, '있으나' is part of '많으나', functioning as a contrastive conjunction meaning 'but'.
그는 돈이 많으나 행복하지 않습니다.
He has a lot of money, but he is not happy.
In this sentence, '있으나' is used to introduce a contrast between the presence of an issue and the ability to solve it.
문제가 조금 있으나 해결 가능합니다.
There is a slight issue, but it is solvable.
Here, '있으나' combines the verb '있다' (to have or exist) with '으나' to provide a contrasting statement.