A Target or RTB could be saved with an empty Advanced Filtering group.

Empty groups could make the saved filter configuration ambiguous and contribute to calls routing differently than expected.

When Advanced Filtering is enabled, saving is blocked if any filter group has no conditions.

The form displays: “Remove empty filter groups before saving,” and directs the user back to the filter panel.

Valid filter groups continue to save normally.

Empty groups are removed defensively when Advanced Filtering is disabled or when a Target/RTB is duplicated.

Configure Advanced Filtering as usual.

Before saving, either add at least one condition to every group or remove any unused group.

Prevents incomplete Advanced Filtering configurations from being persisted.

Reduces the risk of calls routing unexpectedly because of an accidental empty group.