I noticed that 16224 rows from the CCLE_mutations 21Q1 file have an Entrez_Gene_Id of 0.
Also it seems that in the Codon_Change column some values have an incorrect format (like “c.e17+1”).
Thanks for reporting this. The entrez IDs are oncotator annotations. Unfortunately the tool is somewhat old and is replacing missing IDs with 0’s if it does not find a proper entrez mapping for the gene. The Codon_change issue is also caused by oncotator. We are planning to update our annotation tool possibly to Funcotator in one of the upcoming quarters. Hopefully many of these issues will be resolved.