If I include IND_ID as a fixed effect too (proposed by j58):
I get this:
fixed-effect model matrix is rank deficient so dropping 22 columns / coefficients
I am dealing with a problem of interpretation concerning an error message due to a generalized linear mixed model.
Datafile is attached to this message.
I try to model the percentage of flowering of different varietes of mustards in function of sum of degrees days (DEGJ_B3), variety...