This might have been done due to operational reasons. 22691/2 will soon get WAP7 end-end once GTL-WADI is electrified (expected by June). Also could be speeded up in TAAG. Speedup/eloco both not possible for 22693/94 till end of 2018. Slot will have to change and moreover its anyway non stop between DMM and SC. So moving 22693 also 22691's route for better occupancy and operational reaaons.