Yep, it is likely to be a collateral damage of Quickset, but there is already that 192.168.88.1 entry, it is only missing the (optional) comment=defconf.
The 0.0.0.0 one needs to be removed, but the 192.168.88.1 existing one is fine.
Rule #4 is there for a reason 
:
The twelve Rules of Mikrotik Club