I feel, KHB9 will be the FL code & Car request for KHP-9 will be notification description.
Is it so??
Are you using Alternative Labeling system for FL???
If so, please check the below note
Note 870256 - Functional location: Alternative labeling and profile
Note 1292157 - FLOC alternate labeling (long ID) is not supported in CCM2
Many notes refers to Alternative Labeling. Please check that.