Hi Annette 🙂
Your SEO plugin should include a section where you can alter the SEO titles and descriptions for events, venues, and organizers. I know with Yoast SEO you are able to easily manage this data, but it’s admittedly been awhile since I used All in One SEO Pack.
Have you done any general web searches on the matter or contacted your SEO plugin author to see if they have any additional information? The only snippets I have relative to SEO are for the Yoast SEO plugin.
I do want to point out our What support is provided for license holders? Knowledgebase article. We’re fairly limited on the amount of support we can provide for these types of requests, but let me know what you find out and we’ll continue investigating.
Thanks and have a great rest of your Saturday!