Duplicate Meeting Records

Hello dear community,

I have the "old" problem in CRM that communications are displayed multiple times.

Since I installed the plugin "Component: UI changes to External Attendees (Sage CRM 2021)", the external attendees also appear as duplicates.

I do not want to install the component "Component: Suppress Display of Duplicate Meeting Records in Company and Person Context (Sage CRM 2021)", because then the red bar for appointments in the past disappears.

Also the manual solution (creation of a list named "CommDedupeList") does not work. Here comes the message that this object name is already used.

Does anyone have an idea how to solve the problem? I would like all external participants and all users to be listed separated by commas in their respective fields.

Thanks in advance for your support.

Best regards,