diff --git a/launcher/LaunchController.cpp b/launcher/LaunchController.cpp
index 32fc99cb..11419358 100644
--- a/launcher/LaunchController.cpp
+++ b/launcher/LaunchController.cpp
@@ -228,6 +228,18 @@ void LaunchController::login() {
                 emitFailed(errorString);
                 return;
             }
+            case AccountState::Disabled: {
+                auto errorString = tr("The launcher's client identification changed. Please remove this account and add it again.");
+                QMessageBox::warning(
+                        m_parentWidget,
+                        tr("Client identification changed"),
+                        errorString,
+                        QMessageBox::StandardButton::Ok,
+                        QMessageBox::StandardButton::Ok
+                );
+                emitFailed(errorString);
+                return;
+            }
             case AccountState::Gone: {
                 auto errorString = tr("The account no longer exists on the servers. It may have been migrated, in which case please add the new account you migrated this one to.");
                 QMessageBox::warning(
diff --git a/launcher/minecraft/auth/AccountData.h b/launcher/minecraft/auth/AccountData.h
index 1b6867de..6749a471 100644
--- a/launcher/minecraft/auth/AccountData.h
+++ b/launcher/minecraft/auth/AccountData.h
@@ -47,6 +47,7 @@ enum class AccountState {
     Offline,
     Working,
     Online,
+    Disabled,
     Errored,
     Expired,
     Gone
diff --git a/launcher/minecraft/auth/AccountList.cpp b/launcher/minecraft/auth/AccountList.cpp
index 04470e1c..e404cdda 100644
--- a/launcher/minecraft/auth/AccountList.cpp
+++ b/launcher/minecraft/auth/AccountList.cpp
@@ -291,6 +291,9 @@ QVariant AccountList::data(const QModelIndex &index, int role) const
                     case AccountState::Expired: {
                         return tr("Expired", "Account status");
                     }
+                    case AccountState::Disabled: {
+                        return tr("Disabled", "Account status");
+                    }
                     case AccountState::Gone: {
                         return tr("Gone", "Account status");
                     }
diff --git a/launcher/minecraft/auth/AccountTask.cpp b/launcher/minecraft/auth/AccountTask.cpp
index 98d8d94d..321b350f 100644
--- a/launcher/minecraft/auth/AccountTask.cpp
+++ b/launcher/minecraft/auth/AccountTask.cpp
@@ -43,6 +43,8 @@ QString AccountTask::getStateMessage() const
         return tr("Authentication task succeeded.");
     case AccountTaskState::STATE_OFFLINE:
         return tr("Failed to contact the authentication server.");
+    case AccountTaskState::STATE_DISABLED:
+        return tr("Client ID has changed. New session needs to be created.");
     case AccountTaskState::STATE_FAILED_SOFT:
         return tr("Encountered an error during authentication.");
     case AccountTaskState::STATE_FAILED_HARD:
@@ -78,6 +80,12 @@ bool AccountTask::changeState(AccountTaskState newState, QString reason)
             emitFailed(reason);
             return false;
         }
+        case AccountTaskState::STATE_DISABLED: {
+            m_data->errorString = reason;
+            m_data->accountState = AccountState::Disabled;
+            emitFailed(reason);
+            return false;
+        }
         case AccountTaskState::STATE_FAILED_SOFT: {
             m_data->errorString = reason;
             m_data->accountState = AccountState::Errored;
diff --git a/launcher/minecraft/auth/AccountTask.h b/launcher/minecraft/auth/AccountTask.h
index dac3f1b5..c2a5d86c 100644
--- a/launcher/minecraft/auth/AccountTask.h
+++ b/launcher/minecraft/auth/AccountTask.h
@@ -35,6 +35,7 @@ enum class AccountTaskState
     STATE_CREATED,
     STATE_WORKING,
     STATE_SUCCEEDED,
+    STATE_DISABLED, //!< MSA Client ID has changed. Tell user to reloginn
     STATE_FAILED_SOFT, //!< soft failure. authentication went through partially
     STATE_FAILED_HARD, //!< hard failure. main tokens are invalid
     STATE_FAILED_GONE, //!< hard failure. main tokens are invalid, and the account no longer exists
diff --git a/launcher/minecraft/auth/MinecraftAccount.cpp b/launcher/minecraft/auth/MinecraftAccount.cpp
index ffc81ed8..a604cadf 100644
--- a/launcher/minecraft/auth/MinecraftAccount.cpp
+++ b/launcher/minecraft/auth/MinecraftAccount.cpp
@@ -176,6 +176,9 @@ void MinecraftAccount::authFailed(QString reason)
 {
     switch (m_currentTask->taskState()) {
         case AccountTaskState::STATE_OFFLINE:
+        case AccountTaskState::STATE_DISABLED: {
+            // NOTE: user will need to fix this themselves.
+        }
         case AccountTaskState::STATE_FAILED_SOFT: {
             // NOTE: this doesn't do much. There was an error of some sort.
         }