'How to remove the email template cache in Odoo ? Odoo14

I only have one email template. I have my template 1 version 1 and if I make a modification on this template 1 for a version 2 (spelling correction for example), it is the version 1 that is sent with Marketing Automation and that is displayed in the preview window (modal window).

I need to permanently delete version 1 for version 2. Is there a button to clear the cache or something?

Thanks for your help

Preview with email template version 1 and email template version 2 in the edit form field

The button preview



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