no population term should have a has_penetrance relation - CHECK FAILURE:  expected 0 but got 3
name	uniquename	cvterm_name	uniquename
  [null]	43f9f82f0a5c5c77-genotype-1	normal growth on thiabendazole [has_penetrance] medium [has_severity] medium	PMID:39016088
  [null]	43f9f82f0a5c5c77-genotype-2	normal growth on thiabendazole [has_penetrance] medium [has_severity] medium	PMID:39016088
  [null]	PomBase-genotype-108116	increased vegetative cell population binucleate index [has_penetrance] complete	PMID:11460168