Client 5.8.9 not enough values to unpack (expected 2, got 1)
MacOS GTK Client 5.8.9 has an error when adding a contact on a Party or adding a line in a Sale :
File "/Users/ced/tryton-5.8/tryton/gui/window/view_form/view/form_gtk/one2many.py", line 339, in _sig_new
File "/Users/ced/tryton-5.8/tryton/gui/window/view_form/view/form_gtk/one2many.py", line 349, in _new_single
File "/Users/ced/tryton-5.8/tryton/gui/window/view_form/screen/screen.py", line 626, in new
File "/Users/ced/tryton-5.8/tryton/gui/window/view_form/screen/screen.py", line 642, in new_position
ValueError: not enough values to unpack (expected 2, got 1)