diff --git a/commands/chat.go b/commands/chat.go
index bced5d8..ec6a85e 100644
--- a/commands/chat.go
+++ b/commands/chat.go
@@ -28,6 +28,7 @@ var ChatCommand *Command = &Command{
 	Category:                   Chatting,
 	RegisterApplicationCommand: true,
 	RegisterMessageCommand:     false,
+	Flags:                      CommandFlagsIsRegistered,
 	ChatInputRun: func(ctx *ChatInputContext) {
 		i := ctx.Inter
 		i.DeferReply(&discordgo.InteractionResponseData{})
diff --git a/commands/dataLength.go b/commands/dataLength.go
index 4489cbb..a380c5b 100644
--- a/commands/dataLength.go
+++ b/commands/dataLength.go
@@ -44,6 +44,7 @@ var DataLengthCommand *Command = &Command{
 	Category:                   General,
 	RegisterApplicationCommand: true,
 	RegisterMessageCommand: true,
+	Flags: CommandFlagsIsRegistered,
 	MessageRun: func(ctx *MsgContext) {
 		dataLengthRun(ctx.Msg.Session, ctx.Msg, ctx.Msg.Author.Username, ctx.Msg.Author.ID)
 	},
diff --git a/commands/deleteLearnedData.go b/commands/deleteLearnedData.go
index 6a2fda1..7cb037d 100644
--- a/commands/deleteLearnedData.go
+++ b/commands/deleteLearnedData.go
@@ -32,6 +32,7 @@ var DeleteLearnedDataCommand *Command = &Command{
 	Category:                   Chatting,
 	RegisterApplicationCommand: true,
 	RegisterMessageCommand:     true,
+	Flags:                      CommandFlagsIsRegistered,
 	MessageRun: func(ctx *MsgContext) {
 		command := strings.Join(*ctx.Args, " ")
 		if command == "" {
diff --git a/commands/learn.go b/commands/learn.go
index 588e1e6..4c2be1c 100644
--- a/commands/learn.go
+++ b/commands/learn.go
@@ -59,6 +59,7 @@ var LearnCommand *Command = &Command{
 	Category:                   Chatting,
 	RegisterApplicationCommand: true,
 	RegisterMessageCommand:     true,
+	Flags:                      CommandFlagsIsRegistered,
 	MessageRun: func(ctx *MsgContext) {
 		if len(*ctx.Args) < 2 {
 			utils.NewMessageSender(ctx.Msg).
diff --git a/commands/learnedDataList.go b/commands/learnedDataList.go
index 005b9d5..f42f753 100644
--- a/commands/learnedDataList.go
+++ b/commands/learnedDataList.go
@@ -53,6 +53,7 @@ var LearnedDataListCommand *Command = &Command{
 	Category:                   Chatting,
 	RegisterApplicationCommand: true,
 	RegisterMessageCommand:     true,
+	Flags:                      CommandFlagsIsRegistered,
 	MessageRun: func(ctx *MsgContext) {
 		var length int
 
diff --git a/configs/version.go b/configs/version.go
index 6e4b0e8..6e645f4 100644
--- a/configs/version.go
+++ b/configs/version.go
@@ -7,7 +7,7 @@ import (
 	"git.wh64.net/muffin/goMuffin/utils"
 )
 
-const MUFFIN_VERSION = "0.0.0-madeleine_canary.250620a"
+const MUFFIN_VERSION = "0.0.0-madeleine_canary.250621a"
 
 var updatedString string = utils.RegexpDecimals.FindAllStringSubmatch(MUFFIN_VERSION, -1)[3][0]
 
diff --git a/handler/messageCreate.go b/handler/messageCreate.go
index 73257fe..926ba35 100644
--- a/handler/messageCreate.go
+++ b/handler/messageCreate.go
@@ -38,6 +38,17 @@ func MessageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {
 		command := commands.Discommand.Aliases[args[0]]
 
 		if command == "" || command == "대화" {
+			if !databases.Database.IsUser(m.Author.ID) {
+				utils.NewMessageSender(&utils.MessageCreate{
+					MessageCreate: m,
+					Session:       s,
+				}).
+					AddComponents(utils.GetUserIsNotRegisteredErrContainer(configs.Config.Bot.Prefix)).
+					SetComponentsV2(true).
+					SetReply(true).
+					Send()
+				return
+			}
 			s.ChannelTyping(m.ChannelID)
 
 			str, err := chatbot.ChatBot.GetResponse(m.Author, strings.TrimPrefix(content, "대화 "))