C++ Help me understand a warning ("... hides overloaded virtual function")

[Snavy]

I've compiled 3777 sources from Fir3Element's repository and the same warning has been popping up through the whole compiling proccess..

the warning message is : ./condition.h:279:8: warning: 'ConditionDamage::updateCondition' hides overloaded virtual function [-Woverloaded-virtual]

I wasn't sure what a "virtual function" was, so I looked it up and found the following answer which made sense:

Why do we need virtual functions in C++?

From what I've read, virtual functions are functions in the base class that you can override in its derived classes. But earlier, when learning about basic inheritance, I was able to override base

stackoverflow.com

Then in condition.h I looked at line 279 and found the following:

bool updateCondition(const ConditionDamage* addCondition);

also notcied that ConditionDamage was inheriting Condition.

class ConditionDamage: public Condition

in condition.h at line 145 ( Condition class ) I found the following.

virtual bool updateCondition(const Condition* addCondition);

now my question is why is updateCondition taking ConditionDamage* as a parameter and not Condition* ?
As far as I understood, that should be fine.

what would happen if I changed it to Condition instead (to work-around the warning)?