The bulk update request #4826 is pending approval.

create alias donkeylad (2) -> dark_n_swampy (4)
create alias 1_800_swampbutt (1) -> dark_n_swampy (4)

Reason: These tags refer to the same artist. Donkeylad is his Furaffinity account, 1_800_Swampbutt is his previous Twitter handle which you can still see listed on his FA profile, and Dark_N_Swampy is his current NSFW Twitter account.

I'd suggest editing the BUR to alias DonkeyLad and 1_800_swampbutt to Dark_N_Swampy. FA is notorious for being unable to change user names (although it's often useful for our purposes), so Dark_N_Swampy can most likely be called their most recent preferred name.