In source data there is data in ICD9 and ICD10. In particular, two different codes are used for Vertebrobasilar artery syndrome
ICD9 435.3 Vertebrobasilar artery syndrome
ICD10 G45.0 Vertebro-basilar artery syndrom
ICD9 (435.3) mapping is correct, as it maps to Snomed Vertebrobasilar artery syndrome, however, ICD10 mapping (G45.0) seems to be wrong, as it maps to Basilar artery syndrome. UMLS mapping from ICD10 to snomed seems to be correct (for example, ebi website shows correct mapping)
When detecting something like this (apart from reporting it), it is ok to create a source_to_concept_map with the correct mapping to be used in the ETL while a new version of the vocabulary is released or just the nonspecific mapping should be used assuming that it will be corrected in the foreseable future?