diff --git a/product/ERP5/bootstrap/erp5_core/CategoryTemplateItem/portal_categories/specialise.xml b/product/ERP5/bootstrap/erp5_core/CategoryTemplateItem/portal_categories/specialise.xml
deleted file mode 100644
index a60e5ded0e598b97f27471b8b6cc095333bb8cd5..0000000000000000000000000000000000000000
--- a/product/ERP5/bootstrap/erp5_core/CategoryTemplateItem/portal_categories/specialise.xml
+++ /dev/null
@@ -1,217 +0,0 @@
-<?xml version="1.0"?>
-<ZopeData>
-  <record id="1" aka="AAAAAAAAAAE=">
-    <pickle>
-      <tuple>
-        <global name="BaseCategory" module="Products.ERP5Type.Document.BaseCategory"/>
-        <tuple/>
-      </tuple>
-    </pickle>
-    <pickle>
-      <dictionary>
-        <item>
-            <key> <string>_count</string> </key>
-            <value>
-              <persistent> <string encoding="base64">AAAAAAAAAAI=</string> </persistent>
-            </value>
-        </item>
-        <item>
-            <key> <string>_mt_index</string> </key>
-            <value>
-              <persistent> <string encoding="base64">AAAAAAAAAAM=</string> </persistent>
-            </value>
-        </item>
-        <item>
-            <key> <string>_tree</string> </key>
-            <value>
-              <persistent> <string encoding="base64">AAAAAAAAAAQ=</string> </persistent>
-            </value>
-        </item>
-        <item>
-            <key> <string>acquisition_append_value</string> </key>
-            <value> <int>0</int> </value>
-        </item>
-        <item>
-            <key> <string>acquisition_base_category</string> </key>
-            <value>
-              <tuple/>
-            </value>
-        </item>
-        <item>
-            <key> <string>acquisition_copy_value</string> </key>
-            <value> <int>0</int> </value>
-        </item>
-        <item>
-            <key> <string>acquisition_mask_value</string> </key>
-            <value> <int>1</int> </value>
-        </item>
-        <item>
-            <key> <string>acquisition_object_id</string> </key>
-            <value>
-              <tuple/>
-            </value>
-        </item>
-        <item>
-            <key> <string>acquisition_portal_type</string> </key>
-            <value> <string>python: []</string> </value>
-        </item>
-        <item>
-            <key> <string>acquisition_sync_value</string> </key>
-            <value> <int>0</int> </value>
-        </item>
-        <item>
-            <key> <string>categories</string> </key>
-            <value>
-              <tuple/>
-            </value>
-        </item>
-        <item>
-            <key> <string>category_type</string> </key>
-            <value>
-              <tuple/>
-            </value>
-        </item>
-        <item>
-            <key> <string>criterion_property</string> </key>
-            <value>
-              <tuple/>
-            </value>
-        </item>
-        <item>
-            <key> <string>description</string> </key>
-            <value> <string></string> </value>
-        </item>
-        <item>
-            <key> <string>fallback_base_category</string> </key>
-            <value>
-              <tuple/>
-            </value>
-        </item>
-        <item>
-            <key> <string>id</string> </key>
-            <value> <string>specialise</string> </value>
-        </item>
-        <item>
-            <key> <string>id_generator</string> </key>
-            <value>
-              <none/>
-            </value>
-        </item>
-        <item>
-            <key> <string>id_group</string> </key>
-            <value>
-              <none/>
-            </value>
-        </item>
-        <item>
-            <key> <string>last_id</string> </key>
-            <value> <string>1</string> </value>
-        </item>
-        <item>
-            <key> <string>membership_criterion_base_category</string> </key>
-            <value>
-              <tuple/>
-            </value>
-        </item>
-        <item>
-            <key> <string>membership_criterion_category</string> </key>
-            <value>
-              <tuple/>
-            </value>
-        </item>
-        <item>
-            <key> <string>multimembership_criterion_base_category</string> </key>
-            <value>
-              <tuple/>
-            </value>
-        </item>
-        <item>
-            <key> <string>portal_type</string> </key>
-            <value> <string>Base Category</string> </value>
-        </item>
-        <item>
-            <key> <string>read_permission</string> </key>
-            <value>
-              <none/>
-            </value>
-        </item>
-        <item>
-            <key> <string>rid</string> </key>
-            <value>
-              <none/>
-            </value>
-        </item>
-        <item>
-            <key> <string>short_title</string> </key>
-            <value>
-              <none/>
-            </value>
-        </item>
-        <item>
-            <key> <string>sid</string> </key>
-            <value>
-              <none/>
-            </value>
-        </item>
-        <item>
-            <key> <string>test_method_id</string> </key>
-            <value>
-              <tuple/>
-            </value>
-        </item>
-        <item>
-            <key> <string>title</string> </key>
-            <value>
-              <none/>
-            </value>
-        </item>
-        <item>
-            <key> <string>write_permission</string> </key>
-            <value>
-              <none/>
-            </value>
-        </item>
-      </dictionary>
-    </pickle>
-  </record>
-  <record id="2" aka="AAAAAAAAAAI=">
-    <pickle>
-      <tuple>
-        <tuple>
-          <string>BTrees.Length</string>
-          <string>Length</string>
-        </tuple>
-        <none/>
-      </tuple>
-    </pickle>
-    <pickle> <int>0</int> </pickle>
-  </record>
-  <record id="3" aka="AAAAAAAAAAM=">
-    <pickle>
-      <tuple>
-        <tuple>
-          <string>BTrees.OOBTree</string>
-          <string>OOBTree</string>
-        </tuple>
-        <none/>
-      </tuple>
-    </pickle>
-    <pickle>
-      <none/>
-    </pickle>
-  </record>
-  <record id="4" aka="AAAAAAAAAAQ=">
-    <pickle>
-      <tuple>
-        <tuple>
-          <string>BTrees.OOBTree</string>
-          <string>OOBTree</string>
-        </tuple>
-        <none/>
-      </tuple>
-    </pickle>
-    <pickle>
-      <none/>
-    </pickle>
-  </record>
-</ZopeData>
diff --git a/product/ERP5/bootstrap/erp5_core/bt/change_log b/product/ERP5/bootstrap/erp5_core/bt/change_log
index c00fb4406e62f7b5ad360dd3557f341b5f91283a..beaa5203678cba7fbaf4218a2dc5cf48fb38be27 100644
--- a/product/ERP5/bootstrap/erp5_core/bt/change_log
+++ b/product/ERP5/bootstrap/erp5_core/bt/change_log
@@ -1,6 +1,3 @@
-2009-07-03 Nicolas
-* Move specialise base_category to erp5_core
-
 2009-06-30 Danièle
 * Create Portal Type for Synchronisation Tool
 
diff --git a/product/ERP5/bootstrap/erp5_core/bt/revision b/product/ERP5/bootstrap/erp5_core/bt/revision
index b0a0271f9c7166bb817c09fa1c5e8de5128a46ee..b8d1607c2b379195041aae8fbed09e9793733f9c 100644
--- a/product/ERP5/bootstrap/erp5_core/bt/revision
+++ b/product/ERP5/bootstrap/erp5_core/bt/revision
@@ -1 +1 @@
-1253
\ No newline at end of file
+1255
\ No newline at end of file
diff --git a/product/ERP5/bootstrap/erp5_core/bt/template_base_category_list b/product/ERP5/bootstrap/erp5_core/bt/template_base_category_list
index 2edde7eafa8dd0f89e83ce24b33f2da73a98979b..b857bce959c563df2fdcaf5d250e8f43c9c678e8 100644
--- a/product/ERP5/bootstrap/erp5_core/bt/template_base_category_list
+++ b/product/ERP5/bootstrap/erp5_core/bt/template_base_category_list
@@ -30,5 +30,4 @@ source_payment
 source_payment_region
 source_project
 source_section
-source_trade
-specialise
\ No newline at end of file
+source_trade
\ No newline at end of file