diff --git a/card.cpp b/card.cpp
index 17e4ee491..e862d5d49 100644
--- a/card.cpp
+++ b/card.cpp
@@ -3419,7 +3419,7 @@ int32_t card::get_set_tribute_count() {
 	return min + (max << 16);
 }
 int32_t card::is_can_be_flip_summoned(uint8_t playerid) {
-	if(is_status(STATUS_FORM_CHANGED))
+	if(is_status(STATUS_CANNOT_CHANGE_FORM))
 		return FALSE;
 	if(current.location != LOCATION_MZONE)
 		return FALSE;
@@ -3947,7 +3947,7 @@ int32_t card::is_capable_attack_announce(uint8_t playerid) {
 	return TRUE;
 }
 int32_t card::is_capable_change_position(uint8_t playerid) {
-	if(is_status(STATUS_FORM_CHANGED))
+	if(is_status(STATUS_CANNOT_CHANGE_FORM))
 		return FALSE;
 	if(data.type & TYPE_LINK)
 		return FALSE;
diff --git a/common.h b/common.h
index ecda182a7..2e997f7af 100644
--- a/common.h
+++ b/common.h
@@ -189,7 +189,7 @@ inline bool check_playerid(int32_t playerid) {
 #define STATUS_NO_LEVEL				0x0020
 #define STATUS_BATTLE_RESULT		0x0040
 #define STATUS_SPSUMMON_STEP		0x0080
-#define STATUS_FORM_CHANGED			0x0100
+#define STATUS_CANNOT_CHANGE_FORM	0x0100
 #define STATUS_SUMMONING			0x0200
 #define STATUS_EFFECT_ENABLED		0x0400
 #define STATUS_SUMMON_TURN			0x0800
diff --git a/operations.cpp b/operations.cpp
index 4b4317dba..bb7c79c52 100644
--- a/operations.cpp
+++ b/operations.cpp
@@ -1938,7 +1938,7 @@ int32_t field::summon(uint16_t step, uint8_t sumplayer, card* target, effect* pr
 		target->set_status(STATUS_SUMMONING, FALSE);
 		target->set_status(STATUS_FLIP_SUMMONING, FALSE);
 		target->set_status(STATUS_SUMMON_TURN, TRUE);
-		target->set_status(STATUS_FORM_CHANGED, TRUE);
+		target->set_status(STATUS_CANNOT_CHANGE_FORM, TRUE);
 		target->enable_field_effect(true);
 		if(target->is_status(STATUS_DISABLED))
 			target->reset(RESET_DISABLE, RESET_EVENT);
@@ -2049,7 +2049,7 @@ int32_t field::flip_summon(uint16_t step, uint8_t sumplayer, card * target, uint
 		if(target->is_status(STATUS_DISABLED))
 			target->reset(RESET_DISABLE, RESET_EVENT);
 		target->set_status(STATUS_FLIP_SUMMON_TURN, TRUE);
-		target->set_status(STATUS_FORM_CHANGED, TRUE);
+		target->set_status(STATUS_CANNOT_CHANGE_FORM, TRUE);
 		return FALSE;
 	}
 	case 4: {
@@ -2397,7 +2397,7 @@ int32_t field::mset(uint16_t step, uint8_t setplayer, card* target, effect* proc
 		++core.normalsummon_state_count[setplayer];
 		check_card_counter(target, ACTIVITY_NORMALSUMMON, setplayer);
 		target->set_status(STATUS_SUMMON_TURN, TRUE);
-		target->set_status(STATUS_FORM_CHANGED, TRUE);
+		target->set_status(STATUS_CANNOT_CHANGE_FORM, TRUE);
 		pduel->write_buffer8(MSG_SET);
 		pduel->write_buffer32(target->data.code);
 		pduel->write_buffer32(target->get_info_location());
@@ -3139,7 +3139,7 @@ int32_t field::special_summon_rule(uint16_t step, uint8_t sumplayer, card* targe
 		for(auto& pcard : pgroup->container) {
 			pcard->set_status(STATUS_SUMMONING, FALSE);
 			pcard->set_status(STATUS_SPSUMMON_TURN, TRUE);
-			pcard->set_status(STATUS_FORM_CHANGED, TRUE);
+			pcard->set_status(STATUS_CANNOT_CHANGE_FORM, TRUE);
 			pcard->enable_field_effect(true);
 			if(pcard->is_status(STATUS_DISABLED))
 				pcard->reset(RESET_DISABLE, RESET_EVENT);
@@ -3356,7 +3356,7 @@ int32_t field::special_summon(uint16_t step, effect* reason_effect, uint8_t reas
 		for(auto& pcard : targets->container) {
 			pcard->set_status(STATUS_SPSUMMON_STEP, FALSE);
 			pcard->set_status(STATUS_SPSUMMON_TURN, TRUE);
-			pcard->set_status(STATUS_FORM_CHANGED, TRUE);
+			pcard->set_status(STATUS_CANNOT_CHANGE_FORM, TRUE);
 			if(pcard->is_position(POS_FACEUP))
 				pcard->enable_field_effect(true);
 		}
@@ -4272,7 +4272,7 @@ int32_t field::send_to(uint16_t step, group * targets, effect * reason_effect, u
 			if(nloc == LOCATION_REMOVED || ((pcard->data.type & TYPE_TOKEN) && pcard->sendto_param.location == LOCATION_REMOVED)) {
 				if(pcard->current.reason & REASON_TEMPORARY) {
 					pcard->reset(RESET_TEMP_REMOVE, RESET_EVENT);
-					pcard->set_status(STATUS_FORM_CHANGED, FALSE);
+					pcard->set_status(STATUS_CANNOT_CHANGE_FORM, FALSE);
 				}
 				else
 					pcard->reset(RESET_REMOVE, RESET_EVENT);
@@ -4654,7 +4654,7 @@ int32_t field::move_to_field(uint16_t step, card* target, uint32_t enable, uint3
 			target->clear_relate_effect();
 		if(ret == RETURN_TEMP_REMOVE_TO_FIELD) {
 			target->current.reason &= ~REASON_TEMPORARY;
-			target->set_status(STATUS_FORM_CHANGED, FALSE);
+			target->set_status(STATUS_CANNOT_CHANGE_FORM, FALSE);
 		}
 		if(ret == 0 && location != target->current.location
 			|| ret == RETURN_TEMP_REMOVE_TO_FIELD && target->turnid != infos.turn_id) {
@@ -4662,7 +4662,7 @@ int32_t field::move_to_field(uint16_t step, card* target, uint32_t enable, uint3
 			target->set_status(STATUS_FLIP_SUMMON_TURN, FALSE);
 			target->set_status(STATUS_SPSUMMON_TURN, FALSE);
 			target->set_status(STATUS_SET_TURN, FALSE);
-			target->set_status(STATUS_FORM_CHANGED, FALSE);
+			target->set_status(STATUS_CANNOT_CHANGE_FORM, FALSE);
 		}
 		target->temp.sequence = seq;
 		if(location != LOCATION_MZONE) {
diff --git a/processor.cpp b/processor.cpp
index 6e2eda24a..e2e7d590e 100644
--- a/processor.cpp
+++ b/processor.cpp
@@ -2316,7 +2316,7 @@ int32_t field::process_idle_command(uint16_t step) {
 			return FALSE;
 		} else
 			add_process(PROCESSOR_FLIP_SUMMON, 0, 0, (group*)target, target->current.controler, 0);
-		target->set_status(STATUS_FORM_CHANGED, TRUE);
+		target->set_status(STATUS_CANNOT_CHANGE_FORM, TRUE);
 		core.units.begin()->step = -1;
 		return FALSE;
 	}
@@ -2375,7 +2375,7 @@ int32_t field::process_idle_command(uint16_t step) {
 			adjust_all();
 			add_process(PROCESSOR_POINT_EVENT, 0, 0, 0, FALSE, 0);
 		}
-		target->set_status(STATUS_FORM_CHANGED, TRUE);
+		target->set_status(STATUS_CANNOT_CHANGE_FORM, TRUE);
 		core.units.begin()->step = -1;
 		return FALSE;
 	}
@@ -2665,7 +2665,7 @@ int32_t field::process_battle_command(uint16_t step) {
 		}
 		if(core.units.begin()->arg3) {//attack announce failed
 			++core.attacker->announce_count;
-			core.attacker->set_status(STATUS_FORM_CHANGED, TRUE);
+			core.attacker->set_status(STATUS_CANNOT_CHANGE_FORM, TRUE);
 			core.chain_attack = FALSE;
 			core.units.begin()->step = -1;
 		}
@@ -2740,7 +2740,7 @@ int32_t field::process_battle_command(uint16_t step) {
 		// go to damage step
 		if(!core.attack_rollback) {
 			++core.attacker->announce_count;
-			core.attacker->set_status(STATUS_FORM_CHANGED, TRUE);
+			core.attacker->set_status(STATUS_CANNOT_CHANGE_FORM, TRUE);
 			core.attacker->announced_cards.addcard(core.attack_target);
 			attack_all_target_check();
 			core.units.begin()->step = 18;
@@ -2773,7 +2773,7 @@ int32_t field::process_battle_command(uint16_t step) {
 	case 13: {
 		if(core.attacker->fieldid_r == core.pre_field[0]) {
 			++core.attacker->announce_count;
-			core.attacker->set_status(STATUS_FORM_CHANGED, TRUE);
+			core.attacker->set_status(STATUS_CANNOT_CHANGE_FORM, TRUE);
 			core.attacker->announced_cards.addcard(core.attack_target);
 			attack_all_target_check();
 		}
@@ -3326,7 +3326,7 @@ int32_t field::process_damage_step(uint16_t step, uint32_t new_attack) {
 		if(core.attacker) {
 			core.attacker->set_status(STATUS_ATTACK_CANCELED, TRUE);
 			++core.attacker->announce_count;
-			core.attacker->set_status(STATUS_FORM_CHANGED, TRUE);
+			core.attacker->set_status(STATUS_CANNOT_CHANGE_FORM, TRUE);
 			core.attacker->announced_cards.addcard(core.attack_target);
 			attack_all_target_check();
 		}
@@ -3678,7 +3678,7 @@ int32_t field::process_turn(uint16_t step, uint8_t turn_player) {
 				pcard->set_status(STATUS_FLIP_SUMMON_TURN, FALSE);
 				pcard->set_status(STATUS_SPSUMMON_TURN, FALSE);
 				pcard->set_status(STATUS_SET_TURN, FALSE);
-				pcard->set_status(STATUS_FORM_CHANGED, FALSE);
+				pcard->set_status(STATUS_CANNOT_CHANGE_FORM, FALSE);
 				pcard->indestructable_effects.clear();
 				pcard->attack_announce_count = 0;
 				pcard->announce_count = 0;