warning 219: local variable "timecounter" shadows a variable at a preceding leve

[PKRanger]

error :
\gamemodes\drp.pwn(6 : warning 219: local variable "timecounter" shadows a variable at a preceding level

- TimeCounter is forwarded on top
- For all the strings/constants are new blabla ontop.

public TimeCounter(playerid, timecounter[])
{
	if (currentstate[playerid] == 0)
	{
	  // beaten time challange!
	  timechallange = timecounter[playerid];
	  KillTimer(timecountertimer[playerid]);
   	timecounter[playerid] = 0;
   	racecheckpoint[playerid] = 0;
   	currentstate[playerid] = 0;
   	return 1;
	  
	}
	else if(timecounter[playerid] > timechallange)
	{
		GameTextForPlayer(playerid,"~g~ You failed to beat the time challange!", 5000, 5);
   	KillTimer(timecountertimer[playerid]);
   	timecounter[playerid] = 0;
   	racecheckpoint[playerid] = 0;
   	currentstate[playerid] = 0;
   	return 1;
	}
	else
	{
   new str[128];
   format(str, sizeof str, "~b~ %d", timecounter[playerid]);
   GameTextForAll(str, 500, 5);
   timecountertimer[playerid] = SetTimer("TimeCounter", 1000, 0);
   timecounter[playerid]++;
	}
	return 1;
}

What does this exacly meens ?

Somehow i have some issues with this countup function when several people are joining it