When entering the WOW Shadowlands game, a popup opens and states 👍

Message: Interface\AddOns\DBM-DefaultSkin\Skin.lua:1: DBM-DefaultSkin no longer used, please remove
Time: Fri Mar 19 18:04:37 2021
Count: 1
Stack: Interface\AddOns\DBM-DefaultSkin\Skin.lua:1: DBM-DefaultSkin no longer used, please remove
[string "=[C]"]: in function error' [string "@Interface\AddOns\DBM-StatusBarTimers\DBT.lua"]:1106: in function RegisterSkin'
[string "@interface\AddOns\DBM-DefaultSkin\Skin.lua"]:1: in main chunk

Locals: (*temporary) = "DBM-DefaultSkin no longer used, please remove"
Message: (null)
Time: Fri Mar 19 18:04:58 2021
Count: 3

Simply delete "DBM-DefaultSkin" from your addons directory :)