changing from default template as a bulk task?

changing from default template as a bulk task?

I've recently created a new request template -

I need to amend all tickets since the start of 2022 to reflect this new template, so that the new fields added on the new template are visible on the old tickets.
Is there a way to change all existing tickets from the default template to the new one all at once (i.e. tick in the list area and then use Actions.
- or do I have to go through each one?

We are currently using 10.509 but I am hopeful that a colleague will be updating soon (as in this week or next..)