A PCC rule applied to a subscriber-host on the node can be overridden by re-submitting the PCC rule with the same name but different contents.
If at least one new flow is sent in the PCC rule update, then the existing flows are removed and replaced with the new flow. If no new flows are submitted, then the existing flows stay in place.
If there are conflicting parameters between the existing rule and the modified rule (for example the combination of the unsupported actions), the PCC rule override fails.