Fixed #1336

lib/CBattleCallback.cpp

@@ -1637,7 +1637,7 @@ ESpellCastProblem::ESpellCastProblem CBattleInfoCallback::battleCanCastThisSpell
 	{
 		//check if there are summoned elementals of other type
 		for( const CStack * st : battleAliveStacks())
-			if(vstd::contains(st->state, EBattleStackState::SUMMONED) && st->getCreature()->idNumber == creIDs[arpos])
+			if(vstd::contains(st->state, EBattleStackState::SUMMONED) && st->getCreature()->idNumber != creIDs[arpos])
 				return ESpellCastProblem::ANOTHER_ELEMENTAL_SUMMONED;
 	}