fix for query

if($_POST['entry'] == ""){
if($_POST['minlevel'] >= "81") {
$sql = "INSERT INTO creature_template (entry, name, modelid1, subname, IconName, minlevel, maxlevel, faction, npcflag, rank, BaseAttackTime, RangeAttackTime, unit_class, lootid, HealthModifier, ManaModifier, ArmorModifier, mechanic_immune_mask)
SELECT DISTINCT max(entry)+1, '$name', '$display', '$subname', '$iconname', '$minlvl', '$maxlvl', '$faction', '$npcflag', '$rank', '$attackdelay', '$attackdelay', '$unitclass', max(entry)+1, '$health', '$mana', '$armor', '$immunemask' FROM creature_template";
}else{
$sql = "INSERT INTO creature_template (entry, name, modelid1, subname, IconName, minlevel, maxlevel, faction, npcflag, rank, BaseAttackTime, RangeAttackTime, unit_class, lootid, HealthModifier, ManaModifier, ArmorModifier, mechanic_immune_mask)
SELECT DISTINCT max(entry)+1, '$name', '$display', '$subname', '$iconname', '$minlvl', '$maxlvl', '$faction', '$npcflag', '$rank', '$attackdelay', '$attackdelay', '$unitclass', max(entry)+1, ($health/(SELECT basehp0 FROM creature_classlevelstats WHERE level = ROUND(($minlvl+$maxlvl)/2, 0) AND class = $unitclass)), '$mana', '$armor', '$immunemask' FROM creature_template";
}}else{
if($_POST['minlevel'] >= "81") {
$sql = "INSERT INTO creature_template (entry, name, modelid1, subname, IconName, minlevel, maxlevel, faction, npcflag, rank, BaseAttackTime, RangeAttackTime, unit_class, lootid, HealthModifier, ManaModifier, ArmorModifier, mechanic_immune_mask)
VALUES ('$entry', '$name', '$display', '$subname', '$iconname', '$minlvl', '$maxlvl', '$faction', '$npcflag', '$rank', '$attackdelay', '$attackdelay', '$unitclass', '$entry', '$health', '$mana', '$armor', '$immunemask')";
}else{
$entry = $_POST['entry'];
$sql = "INSERT INTO creature_template (entry, name, modelid1, subname, IconName, minlevel, maxlevel, faction, npcflag, rank, BaseAttackTime, RangeAttackTime, unit_class, lootid, HealthModifier, ManaModifier, ArmorModifier, mechanic_immune_mask)
VALUES ('$entry', '$name', '$display', '$subname', '$iconname', '$minlvl', '$maxlvl', '$faction', '$npcflag', '$rank', '$attackdelay', '$attackdelay', '$unitclass', '$entry', ($health/(SELECT basehp0 FROM creature_classlevelstats WHERE level = ROUND(($minlvl+$maxlvl)/2, 0) AND class = $unitclass)), '$mana', '$armor', '$immunemask')";
}}