Thanks Paulo for reaching out. I'd suggest opening a support ticket for this in order to request an increase to your Curated Detection capacity. 

Depending on which rules (and licensing) that you have enabled, the capacity upper limits could be consumed quickly.

Alternatives to an increase could be disabling rules that have high capacity utilization quantities. 

Thanks DAPerry!

Do you know where can I find these licences limits for Curated Rules? I didn't find in documentation.
https://cloud.google.com/chronicle/docs/detection/curated-detections

Thanks for referencing the link! 

Since quantities aren't publicly referenced (that I could find as of this post) I have to point you towards your account team/security engineer to provide more personalized context on your existing capacity (150 based on your screenshot) and allow them to discuss with you any potential options for increases if that's the desired end goal.