bt5_config: Don't trash previous objects for erp5 core bt5

product/ERP5/Document/BusinessTemplate.py

@@ -5405,6 +5405,9 @@ Business Template is a set of definitions, such as skins, portal types and categ
       # always created a trash bin because we may to save object already present
       # but not in a previous business templates apart at creation of a new site
       if trash_tool is not None and (len(object_to_update) > 0 or len(self.portal_templates) > 2):
+        if self.title == 'erp5_core':
+          trashbin = None
+        else:
           trashbin = trash_tool.newTrashBin(self.getTitle(), self)
       else:
         trashbin = None