Change price of already produced cars?

Hello, I accidentally produced way too many units of one car in the campaign. I just stopped the production in the large factory but still have 9k cars too many with only 120 selling per month. Is there a way to decrease the price of these existing cars to get rid of them more quickly before they become “outdated” and their desirability takes a dive?

Hope you already figured it out.
But yes, in the screenshot the highlighted button right next to “-2.53” is how you change car trim prices after they are being produced.