Red error pop-up: Failed to save attendee <name>. Error message: User is already used.

For Attendees already in the system:

1. Go to Attendees > Check via search if the email is already in use for another attendee within your event. If not, then this user is known for another event within Krowden.

2. Go to Attendees > Add this person as a new user

3. Update the information for this user
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💡 Tip: Session Hosts already in the system

Step 1 & 2 are the same

Step 3 > Go to Sessions > update the host to the new user.
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Read here how to change a session host