I have been doing a lot of alterations with an SLA, and have finally gone back to the SLA the way it originally was. It was working well when I first created the SLA, but now the indexing error is coming up on all the tickets raised in the last couple of weeks, and I can not see where the issue is on my SLA.

This is the indexing error I am getting and this is my SLA
Any idea why there is an indexing issue?