There are some (at least InventoryConstraint from erp5_trade) Property Sheets
which contained bugs at some point, preventing their import. This should not
prevent import of all other valid Property Sheets, so upgrade without manual
intervention (aka upgrader) is possible.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@44245 20353a03-c40f-0410-a6d1-a30d3c3de9de