FeatureExtraction 2.0

@schuemie , can you please help me with the logic of creating custom covariates?
Looking the vignette I found the next:

cohort_definition_id, A key to link to the cohort table. Note that this will be come the covariate
ID, so you should take care that these IDs do not overlap with IDs of other covariate builders that may
be used as well

I actually want to take care of assigning cohort_definition_id in order not to overlap with other default covariates I’m going to use. It seems like I can’t just use cohort_definition_id’s from Atlas and need to reassign it as well.
Is there some range of numbers which is not used for default covariate_id’s?
I tried to obtain it via reverse engineering, but failed =(