message: chore: empty strings are still strings, so if it's not set default to undefined to throw the correct error
diff: @@ -72,7 +72,7 @@ export const EntityPicker = (
  const onSelect = useCallback(
  (_: any, value: string | null) => {
  - onChange(value || '');
  + onChange(value ?? undefined);
  },
  [onChange],
  );
  