hello dear, in my statistical analysis by spss version 27 there is a warning"Warnings There are 13 (43.3%) cells (i.e., dependent variable levels by observed combinations of predictor variable values) with zero frequencies." , why this was happen and how it will be solved?

Hi @woyo hirpo

Taken at face value, it seems like you have insufficient data to carry out your analysis.  In such a case, you might restrict your analysis to the data you have, or collect more data.