Since [1] whenever the image of a `product.template` is updated, the write date of all its related `product.product` is updated. This was done to force a change of the unique parameter on image fields, which is based on the last update field. After this commit the `product.product`'s last update is instead computed by also taking the `product.template`'s last update into account. This avoids the need for updating the write date when the image is changed, but on the other hand it also forces product images to be reloaded whenever any other field of the `product.template` is changed. [1] https://github.com/odoo/odoo/pull/71139 Related to https://github.com/odoo/odoo/pull/76309 task-2477438 closes odoo/odoo#78356 Signed-off-by: Romain Derie (rde) <rde@odoo.com> Co-authored-by: Benoit Socias <bso@odoo.com>