The bulk update request #2859 is pending approval.
create alias open-back_dress (0) -> backless_dress (1306)
create alias open_back_dress (40) -> backless_dress (1306)
create implication backless_dress (1306) -> backless_clothing (1976)
create implication backless_dress (1306) -> dress (85329)
create alias open-back_leotard (196) -> backless_leotard (245)
create implication backless_leotard (245) -> backless_clothing (1976)
create implication backless_leotard (245) -> leotard (15234)
create alias open-back_swimsuit (504) -> backless_swimsuit (590)
create implication backless_swimsuit (590) -> backless_clothing (1976)
create implication backless_swimsuit (590) -> one-piece_swimsuit (19646)
create alias open-back_sweater (5) -> backless_sweater (4)
create alias open_back_sweater (12) -> backless_sweater (4)
create implication backless_sweater (4) -> backless_topwear (30)
create implication backless_sweater (4) -> backless_clothing (1976)
create implication backless_sweater (4) -> sweater (37457)
create alias open-back_shirt (0) -> backless_shirt (7)
create implication backless_shirt (7) -> backless_topwear (30)
create implication backless_shirt (7) -> backless_clothing (1976)
create implication backless_shirt (7) -> shirt (324840)
create alias open-back_topwear (3) -> backless_topwear (30)
create implication backless_topwear (30) -> backless_clothing (1976)
create implication backless_topwear (30) -> topwear (538844)
create alias open-back_clothing (10) -> backless_clothing (1976)
create implication backless_clothing (1976) -> clothing (2065697)
Reason: "backless" is used for 14 tags while "open-back" is only used for 6 tags as of now. "Backless" seems to be the preferred term: Wikipedia