Use subordination category on Computer Partition.

bt5/erp5_computer_immobilisation/PortalTypeBaseCategoryTemplateItem/base_category_list.xml

@@ -9,4 +9,7 @@
  <portal_type id="Computer Network Module">
   <item>business_application</item>
  </portal_type>
+ <portal_type id="Computer Partition">
+  <item>subordination</item>
+ </portal_type>
 </base_category_list>
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bt5/erp5_computer_immobilisation/bt/revision

-56
+57
\ No newline at end of file

bt5/erp5_computer_immobilisation/bt/template_portal_type_base_category_list

 Computer Model Module | business_application
 Computer Network Module | business_application
+Computer Partition | subordination
 Computer | specialise
 Computer | subordination
\ No newline at end of file