Plink error message while merging

Question

[amitgourav.ghosh12]

During merging of two data sets(in binary format) I get the following message:

Error: When ambiguous-sex samples with phenotype data are present, --make-bed/--make-just-fam/--recode/--write-covar usually cannot be combined with other commands. Split them across multiple PLINK runs, or use --allow-no-sex/--must-have-sex. What does it mean? Is it significant enough to make any change?

Answer 1

[amitgourav.ghosh12]

--allow-no-sex option use in the command line helped. Problem solved. Thank you!