At present, the physical_filter for DECam is something like "g DECam SDSS c0001 4720.0 1520.0", which is not ideal. It should probably just be "g"? Or perhaps, e.g., "g_4720_1520" if more specificity is desired. (And so on for the other bands.)
The goals here are (1) no spaces and (2) shorter as feasible.
Ideally this can be fixed in the next few weeks, before any shared DECam gen3 repository lands in /datasets.