“Activation blocked — audience overlaps”
Someone in this audience is already covered for this occasion.
One active campaign per person per occasion — that's what prevents double cards. The activation message names exactly who is claimed and by which campaign. Your options:
- Narrow this campaign's audience (exclude those members), or
- Pause/archive the other campaign to release its claims, or
- If you were opening a quick card: use the offered "open the card from that campaign instead" button — same result, zero conflict.