Cascading key results is important for supporting cross-collaboration. However, when required, you can unlink a key result from its parent.
If this key result has a parent one that cascades down into this one, you can unlink it.
Perform the following:
In the navigation pane, under OKRs, click All sessions.
Click the session where the child key result is.
Click the OKR where the child key result is.
In the Key results section, expand the menu of the key result that you want to unlink.
Click Unlink key result from parent.
This key result does not contribute to the parent key result anymore.