Bootstrap的模态 - 当我打开和关闭第二个模态时，垂直滚动条消失了第一个模态

I have 2 bootstrap modals. When i open the first one, the vertical scroll bar works fine. Then, i have an option from inside of the first modal which removes its opacity opacity and opens the second one. By closing the second modal i get back my first modal but instead to be able to scroll to the modal i can only scroll to the background body. I have 2 bootstrap modals. When i open the firs