[.FuneraL.]

Create one variable and set for the command, example:

pawn Код:

new CreateShip[MAX_PLAYERS];

//In Command:

CreateShip[playerid] = 1;

// Top of Command;

if(CreateShip[playerid] == 1) return SendClientMessage(playerid, -1, "You created the ship, please use /removeship");

// Command of Remove

CreateShip[playerid] = 0;

Try this.