Before this commit, it was possible for one to post multiple reviews when all the already posted reviews had the 'Employee Only' state. A traceback was also thrown when trying to update an 'Employee Only' comment. It was also possible to edit a log note. This commit fixes all these issues. Task-2810085 closes odoo/odoo#121052 X-original-commit: 2e4f8ff553b11ecae444933aa2b9fab6175e64ef Signed-off-by: Stéphane Debauche (std) <std@odoo.com> Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>