Hello. I've been fighting with a Server 2019 that was patching fine up through this most recent June 2024 cumulative patch, KB5039217. Any attempt I've made to apply it has returned a 0x800f0986 - PSFX_E_APPLY_FORWARD_DELTA_FAILED error code. sfc /scannow and dism /online /cleanup-image /restorehealth both come back with no errors found. sfcfix doesn't identify any problems either. Review of the CBS.log file shows problems with some of the checksums and one of the packages (2024-06-18 13:26:53 is the timestamp of the run for the attached log file), but I'm stumped on where to take this next.