Purpose ======= We should not be able to duplicate the link trackers (as it makes no sense from a functionnal POV). Task-2090344 closes odoo/odoo#50303 X-original-commit: c236b976f6a1bfa92fa6cd6325f652eec461c805 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>