en-US/modify-delete-service-offerings.xml

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<section id="modify-delete-service-offerings">
    <title>Modifying or Deleting a Service Offering</title>
    <para>Service offerings cannot be changed once created. This applies to both compute offerings and disk offerings.</para>
    <para>A service offering can be deleted. If it is no longer in use, it is deleted immediately and permanently. If the service offering is still in use, it will remain in the database until all the virtual machines referencing it have been deleted. After deletion by the administrator, a service offering will not be available to end users that are creating new instances.</para>
</section>