[Zope] How do I get rid of this message

How do I get rid of this message: .\lib\python\SearchIndex\__init__.py:19: DeprecationWarning: The usage of the Se archIndex package is deprecated since Zope 2.4. This package is only kept for backwards compatibility for a while and will go away in a future release. Please use instead the re-factored modules in Products/PluginIndexes. warnings.warn("The usage of the SearchIndex package is deprecated since \ I upgraded a server from 2.3.3 to 2.5.1, by installing a new 2.5.1 instance, and copying the Data.fs. I don't use any SearchIndex any more, all the ZCatalogs have been recreated using PluginIndexes. I have removed the references to all old products (I think). What more can I do? //Lennart