new Text3D:Clanlabel[MAX_PLAYERS];
zu:
new Text3D:Clanlabel[MAX_PLAYERS] = {Text3D:-1,...};
Und:
Delete3DTextLabel(Clanlabel[playerid]);
zu:
if(Clanlabel[playerid] != Text3D:-1) Delete3DTextLabel(Clanlabel[playerid]);
Clanlabel[playerid] = Text3D:-1;