There were at least three copies of those: - OB_RECALC* family of flags, which are rudiment of an old dependency graph system. - PSYS_RECALC* which were used by old dependency graph system as a separate set since the graph itself did not handle particle systems. - DEG_TAG_* which was used to tag IDs. Now there is a single set, which defines what can be tagged and queried for an update. It also has some aggregate flags to make queries simpler. Lets once and for all solve the madness of those flags, stick to a single set, which will not overlap with anything or require any extra conversion. Technically, shouldn't be measurable user difference, but some of the agregate flags for few dependency graph components did change. Fixes T58632: Particle don't update rotation settings