[HELP] How can I open a file in place of the current buffer?

When opening a file from NeoTree (via `o`, `t` or ``), new tab with the buffer is always created at the end of the bufferline. How can I open a file in place of the current tab buffer (I assume closing the current buffer and opening the selected buffer should happen in the same place)? I would set a shortcut for this to `o` in NeoTree, but I don't know how to achieve this in the bufferline.