This seriesfrom Black Mask was supposed to run 5 issues and #5 was solicited. And i ordered it back in 2019.
As far as I’m aware #5 was never published. I was credited for #5 and I can find no evidence of there being a #5. GCD only lists 4 issuesin this series, for instance.
Black Mask subsequently put out a Tpb containing 1-5, and i think this Tpb is the only place #5 saw the light of day.
If you can also find no evidence of #5 being printed, I’d suggest it be removed from this series in Core.