Impacted versions: 10.0/11.0

Steps to reproduce: go to [http://281537-11-0-12c7d3.runbot8.odoo.com](http://281537-11-0-12c7d3.runbot8.odoo.com/web?debug=1?#id=12&view_type=form&model=ir.sequence&menu_id=38&action=22) --> Settings --> Sequences --> 'Account reconcile sequence'

Current behavior: Traceback during Saving record

![](https://image.prntscr.com/image/G4x_oq6xQr2HduZQiUPDdA.png)

Change Implementation to Standard and Save the record.

![](https://image.prntscr.com/image/cv0b3Pq9SzW0Dya-zZ4cyA.png)
Expected behavior: Should Save the record

Video/Screenshot link (optional): 


openerp/addons/base/ir/ir_sequence.py
if self.implementation == 'standard':
            number_next = _select_nextval(self.env.cr, 'ir_sequence_%03d' % self.id)
        else:
            number_next = _update_nogap(self, self.number_increment)
        return self.get_next_char(number_next)
    def get_next_char(self, number_next):