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 parent key result is.
In the Key results section, expand the menu of the parent key result and click cascade to find all child key results you might need to unlink.
Click on the recycle bin icon next to the child key result you want to unlink.
This key result does not contribute to the parent key result anymore.