[Niixie]

Do

pawn Код:

if(IsPlayerInDM[playerid] == 1) {
     SendClientMessage(playerid, 0xFF00AAFF, "SERVER: You are already in DM!");
     return 0;
} else {
     // Your code
}

ofc you need to

pawn Код:

new IsPlayerInDM[MAX_PLAYERS];