The bulk update request #2859 is pending approval.
create alias open-back_dress (0) -> backless_dress (1307)
create alias open_back_dress (40) -> backless_dress (1307)
create implication backless_dress (1307) -> backless_clothing (1977)
create implication backless_dress (1307) -> dress (85693)
create alias open-back_leotard (196) -> backless_leotard (246)
create implication backless_leotard (246) -> backless_clothing (1977)
create implication backless_leotard (246) -> leotard (15323)
create alias open-back_swimsuit (504) -> backless_swimsuit (590)
create implication backless_swimsuit (590) -> backless_clothing (1977)
create implication backless_swimsuit (590) -> one-piece_swimsuit (19704)
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 (1977)
create implication backless_sweater (4) -> sweater (37620)
create alias open-back_shirt (0) -> backless_shirt (7)
create implication backless_shirt (7) -> backless_topwear (30)
create implication backless_shirt (7) -> backless_clothing (1977)
create implication backless_shirt (7) -> shirt (326123)
create alias open-back_topwear (3) -> backless_topwear (30)
create implication backless_topwear (30) -> backless_clothing (1977)
create implication backless_topwear (30) -> topwear (541076)
create alias open-back_clothing (10) -> backless_clothing (1977)
create implication backless_clothing (1977) -> clothing (2073235)
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