Currently, when we delete a single certification that is linked to a course,
it gives a validation error, which is good. But when we try to delete multiple
certifications that are linked with courses, it throws an error.
This commit fixes the issue by properly handling multiple records in the
deletion check, and updates the ValidationError message accordingly.
taskID-2901629
closesodoo/odoo#97391
X-original-commit: fecc1babb63ad1164189c95bb019afb2469043bb
Signed-off-by: Warnon Aurélien (awa) <awa@odoo.com>
Pratik Raval
8b1daf9b80