Mutect2 files from TCGA - FORMAT tag [QSS] expected different number of values (expected 1, found 2)

Hi,

I am trying to run vcf-validator (vcftools) on some VCF files I obtained from TCGA. These files are tumor-normal vcf files called using Mutect2. When I try and run vcf validator I get an error:

------------------------
Summary:
6220 errors total

6220 .. column NORMAL at chr1:14677 .. FORMAT tag [QSS] expected different number of values (expected 1, found 2)


Any ideas on what is wrong and what I can do to fix it?

Thanks