Wrong conversion rate from EUR to CZK

Hi, I’m not sure if I’ve changed anything, but I have two exchange rates in my currency and the second one is used for conversion. And it’s wrong. 1 EUR is not around 24 CZK but 0.0407 CZK
And can’t delete the second one.
Can you help me?

The one called “Security based exchange rate provider” is created by you. Go to “all securities” section (top left), select the filter “only exchange rates” (top right) and then edit the exchange rate as needed.

Well thank you. It is solved.