When the database is migrated from 13.3 to 14.0, the write_date is not set on the 'calendar.event' records. During the syncing with google api, the write-date is compared to take the more recent values, leading to an inevitable crash for recently migrated databases. closes odoo/odoo#63007 Taskid: 2389374 X-original-commit: e1493af550bd425ca682e4db707e5a490d3d4af8 Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>