The format of amplifier information catalogs has changed. Your versions of afw and associated obs_ packages must be compatible or else you will get errors when building a camera mapper (thus when running any nearly any command-line task).
Amplifier information catalogs have a new field as of DM-6147: suspect level. If the value is not
nan then pixels whose values are above this level are masked as SUSPECT.
The only cameras that specify a suspect level, so far, are HSC and suprimecam. However, a value can be set for any camera, if desired. SUSPECT is intended to indicate pixels with doubtful values due to errors that are difficult to correct accurately, e.g. a regime where linearity correction is not very stable.
In addition, saturation level in the amplifier information catalog is now a floating point value (instead of an integer) and a value of
nan means "do not mask pixels as SAT`