Production Confirmed with AI orders - Not firmed Not fixed

Dears.

For no apparent action or reason the key figure Production Confirmed (9AFPROD) has orders that are not firmed or confirmed. ATP Category is AI. This is in the entire horizon of next 53 buckets. Production confirmed ALSO has process orders AA and AB from ECC and that is all good per the ATP Category groups/ATP category assigned to this key fig in the planning

But

What could be the possible reasons for Production Confirmed key figure to have the AI orders for the entire horizon when no one did anything? Neither in APO nor in ECC. The quantities are just about the same as Production Planned. ..bucket by bucket. But there are multiple Production Orders of type AI when I click details.

What action could have triggered this?

PS: The planned orders continue to exist in the production planned key figure