A. If you are getting this error message when trying to create a new cohort in the cohort builder, you will need to change the cohort name.
Two cohorts cannot have the same name. Try adding 'v2' or differentiating the cohort name in another way.
If you are still having problems, please get in touch by contacting firstname.lastname@example.org or using the live chat icon in the bottom right corner of your Permutive dashboard.