Fixes https://github.com/odoo/odoo/pull/39583 This commit adds a default value for event_count Assigning default value for non-stored compute fields is required in 13.0 closes odoo/odoo#39974 X-original-commit: 9ca72b98f54d7686c0e6019870b40f14dbdd2881 Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>