You are already a participant of this event

Description

When joining an event as anonymous, no matter the e-mail, Mobilizon gives the error "You are already a participant of this event"

Steps to Reproduce

Having this in the config.

Opening event in incognito/private mode in the browser, pressing "Participate" and selecting "I don't have an account".

Expected behaviour:

That the anonymous user can join the event.

Actual behaviour:

Mobilizon gives the error "You are already a participant of this event".

Reproduces how often:

Every time.

Versions

• Mobilizon 3.0.0
• Waterfox G4.1.5
• Firefox Android
• Chrome Android