diff --git a/scripts/install.sh b/scripts/install.sh
index a515cf85ddb..fc1194739f9 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -3088,13 +3088,19 @@ fail_force_station_terminal_required() {
 }
 
 validate_force_station_install_override() {
-  local platform="$1"
+  local platform="$1" release_state
   if [ "${FORCE_STATION_INSTALL:-}" != "1" ]; then
     return 0
   fi
   if [ "$platform" != "DGX Station" ]; then
     error "--force-station-install requires DGX Station GB300 hardware (detected: ${platform:-unsupported platform})."
   fi
+  release_state="$(classify_dgx_station_release)"
+  case "$release_state" in
+    generic-ubuntu | supported-dgx-os | supported-colossus-baseos | supported-ai-developer-tools)
+      error "--force-station-install is only for unrecognized DGX Station release metadata. This host is already supported (${release_state}); omit --force-station-install."
+      ;;
+  esac
   if [ "${NEMOCLAW_NO_EXPRESS:-}" = "1" ]; then
     error "--force-station-install cannot be combined with NEMOCLAW_NO_EXPRESS=1. Remove one override."
   fi
@@ -3689,7 +3695,9 @@ maybe_offer_express_install() {
     describe_express_install "$platform"
     printf "  Run express install with these settings? [Y/n]: "
     if ! IFS= read -r reply; then
-      if [ "${STATION_DEEPSEEK:-}" = "1" ]; then
+      if [ "${FORCE_STATION_INSTALL:-}" = "1" ]; then
+        fail_force_station_terminal_required
+      elif [ "${STATION_DEEPSEEK:-}" = "1" ]; then
         fail_station_deepseek_terminal_required
       fi
       info "Skipping express install (unable to read from TTY)."
@@ -3701,7 +3709,9 @@ maybe_offer_express_install() {
     printf "  Run express install with these settings? [Y/n]: "
     if ! IFS= read -r reply <&3; then
       exec 3<&-
-      if [ "${STATION_DEEPSEEK:-}" = "1" ]; then
+      if [ "${FORCE_STATION_INSTALL:-}" = "1" ]; then
+        fail_force_station_terminal_required
+      elif [ "${STATION_DEEPSEEK:-}" = "1" ]; then
         fail_station_deepseek_terminal_required
       fi
       info "Skipping express install (unable to read from TTY)."
diff --git a/scripts/prepare-dgx-station-host.sh b/scripts/prepare-dgx-station-host.sh
index f41b91eb3df..a392a72d9d9 100755
--- a/scripts/prepare-dgx-station-host.sh
+++ b/scripts/prepare-dgx-station-host.sh
@@ -631,6 +631,13 @@ check_platform() {
   is_station_gb300_product "$product" || fatal "Expected DGX Station GB300 DMI, found ${product}"
   release_path="$(dgx_station_release_path)"
   release_state="$(dgx_station_release_state "$release_path")"
+  if ((FORCE_STATION_INSTALL == 1)); then
+    case "$release_state" in
+      generic-ubuntu | supported-dgx-os | supported-colossus-baseos | supported-ai-developer-tools)
+        fatal "--force-station-install is only for unrecognized DGX Station release metadata. This host is already supported (${release_state}); omit --force-station-install."
+        ;;
+    esac
+  fi
   case "$release_state" in
     generic-ubuntu)
       station_has_exact_gb300_pci_gpu "$(station_pci_devices_path)" \
@@ -642,6 +649,8 @@ check_platform() {
     supported-ai-developer-tools) STATION_HOST_PROFILE="ai-developer-tools" ;;
     *)
       if ((FORCE_STATION_INSTALL == 1)); then
+        station_has_exact_gb300_pci_gpu "$(station_pci_devices_path)" \
+          || fatal "Expected an NVIDIA GB300 PCI GPU (${GB300_PCI_VENDOR#0x}:${GB300_PCI_DEVICE#0x}) before forced factory-runtime validation"
         STATION_HOST_PROFILE="forced-factory-runtime"
         warn "DGX release metadata allowlist bypassed by explicit --force-station-install intent; all hardware and factory-runtime health checks remain required"
       else
diff --git a/test/install-express-prompt.test.ts b/test/install-express-prompt.test.ts
index 2f6965760b9..b41e78e5fa3 100644
--- a/test/install-express-prompt.test.ts
+++ b/test/install-express-prompt.test.ts
@@ -59,6 +59,7 @@ else:
     script = r'''
 source "$INSTALLER_UNDER_TEST" >/dev/null
 detect_express_platform() { printf "$EXPRESS_PLATFORM"; }
+classify_dgx_station_release() { printf "%s" "\${EXPRESS_RELEASE_STATE:-generic-ubuntu}"; }
 NON_INTERACTIVE="\${NON_INTERACTIVE:-}"
 NEMOCLAW_PROVIDER="\${NEMOCLAW_PROVIDER:-}"
 NEMOCLAW_NO_EXPRESS="\${NEMOCLAW_NO_EXPRESS:-}"
@@ -519,10 +520,24 @@ ensure_station_express_host`,
       name: "a forced Station install in non-interactive mode",
       args: ["--force-station-install", "--non-interactive"],
       platform: "DGX Station",
-      env: {},
+      env: { EXPRESS_RELEASE_STATE: "unsupported-dgx-os" },
       message:
         /--force-station-install selects the DGX Station express prompt and cannot be combined with non-interactive mode \(triggered by: the --non-interactive flag\)/,
     },
+    ...[
+      "generic-ubuntu",
+      "supported-dgx-os",
+      "supported-colossus-baseos",
+      "supported-ai-developer-tools",
+    ].map((releaseState) => ({
+      name: `an unnecessary forced Station install on ${releaseState}`,
+      args: ["--force-station-install"],
+      platform: "DGX Station",
+      env: { EXPRESS_RELEASE_STATE: releaseState },
+      message: new RegExp(
+        `This host is already supported \\(${releaseState}\\); omit --force-station-install`,
+      ),
+    })),
     {
       name: "a Station-only flag on DGX Spark",
       args: ["--station-deepseek"],
@@ -570,6 +585,7 @@ ensure_station_express_host`,
         `
 source "$INSTALLER_UNDER_TEST" >/dev/null
 detect_express_platform() { printf "%s" "$EXPRESS_PLATFORM"; }
+classify_dgx_station_release() { printf "%s" "\${EXPRESS_RELEASE_STATE:-generic-ubuntu}"; }
 ensure_docker() { printf "ensure_docker\\n" >>"$MUTATION_LOG"; }
 ensure_openshell_build_deps() { printf "ensure_openshell_build_deps\\n" >>"$MUTATION_LOG"; }
 main "$@"
@@ -762,6 +778,20 @@ sys.exit(result.returncode)
     expect(output).not.toMatch(/RESULT NON_INTERACTIVE=/);
   });
 
+  it("fails closed if the forced Station prompt becomes unreadable after preflight (#7138)", () => {
+    const result = runExpressPromptWithTty("", "tty", "DGX Station", {
+      EXPRESS_RELEASE_STATE: "unsupported-dgx-os",
+      FORCE_EXPRESS_PROMPT_READ_FAILURE: "1",
+      FORCE_STATION_INSTALL: "1",
+    });
+    const output = `${result.stdout}${result.stderr}`;
+    expect(result.error, output).toBeUndefined();
+    expect(result.status, output).not.toBe(0);
+    expect(output).toMatch(/--force-station-install.*needs an interactive terminal/);
+    expect(output).not.toMatch(/Skipping express install/);
+    expect(output).not.toMatch(/RESULT NON_INTERACTIVE=/);
+  });
+
   it.each([
     ["Unsupported DGX Station OS", { NEMOCLAW_NO_EXPRESS: "1" }],
     ["Unsupported DGX Station generation", { NEMOCLAW_PROVIDER: "openai" }],
diff --git a/test/install-station-dgx-os.test.ts b/test/install-station-dgx-os.test.ts
index 8b31d3c6655..bffe5d85572 100644
--- a/test/install-station-dgx-os.test.ts
+++ b/test/install-station-dgx-os.test.ts
@@ -403,6 +403,7 @@ station_os_release_path() { printf '%s' "$HOME/os-release"; }
 station_product_name_path() { printf '%s' "$HOME/product-name"; }
 dgx_station_release_path() { printf '%s' "$HOME/dgx-release"; }
 dgx_station_release_state() { printf 'unsupported-dgx-os'; }
+station_has_exact_gb300_pci_gpu() { return 0; }
 FORCE_STATION_INSTALL=1
 check_platform
 printf 'PROFILE=%s\n' "$STATION_HOST_PROFILE"
@@ -431,6 +432,57 @@ check_platform
     expect(unforced.output).toContain("outside the validated boundary");
   });
 
+  it.each([
+    "generic-ubuntu",
+    "supported-dgx-os",
+    "supported-colossus-baseos",
+    "supported-ai-developer-tools",
+  ])("rejects explicit metadata intent for recognized %s before preparation (#7138)", (releaseState) => {
+    const { result, output } = runSourced(
+      STATION_PREPARE,
+      `
+printf 'ID=ubuntu\nVERSION_ID="24.04"\nPRETTY_NAME="Ubuntu 24.04"\n' >"$HOME/os-release"
+printf 'NVIDIA DGX Station GB300\n' >"$HOME/product-name"
+uname() { printf 'aarch64\n'; }
+station_os_release_path() { printf '%s' "$HOME/os-release"; }
+station_product_name_path() { printf '%s' "$HOME/product-name"; }
+dgx_station_release_path() { printf '%s' "$HOME/dgx-release"; }
+dgx_station_release_state() { printf '%s' "$RELEASE_STATE"; }
+FORCE_STATION_INSTALL=1
+check_platform
+printf 'PREPARATION_REACHED\n'
+`,
+      { RELEASE_STATE: releaseState },
+    );
+
+    expect(result.status, output).not.toBe(0);
+    expect(output).toContain(
+      `This host is already supported (${releaseState}); omit --force-station-install`,
+    );
+    expect(output).not.toContain("PREPARATION_REACHED");
+  });
+
+  it("keeps generic Ubuntu preparation unchanged without explicit metadata intent (#7138)", () => {
+    const { result, output } = runSourced(
+      STATION_PREPARE,
+      `
+printf 'ID=ubuntu\nVERSION_ID="24.04"\nPRETTY_NAME="Ubuntu 24.04"\n' >"$HOME/os-release"
+printf 'NVIDIA DGX Station GB300\n' >"$HOME/product-name"
+uname() { printf 'aarch64\n'; }
+station_os_release_path() { printf '%s' "$HOME/os-release"; }
+station_product_name_path() { printf '%s' "$HOME/product-name"; }
+dgx_station_release_path() { printf '%s' "$HOME/dgx-release"; }
+dgx_station_release_state() { printf 'generic-ubuntu'; }
+station_has_exact_gb300_pci_gpu() { return 0; }
+check_platform
+printf 'PROFILE=%s\n' "$STATION_HOST_PROFILE"
+`,
+    );
+
+    expect(result.status, output).toBe(0);
+    expect(output).toContain("PROFILE=generic-ubuntu");
+  });
+
   it("parses the metadata override only alongside a preparation mode", () => {
     const accepted = runSourced(
       STATION_PREPARE,
diff --git a/test/install-station-platform-identity.test.ts b/test/install-station-platform-identity.test.ts
index f904a4bfbcb..fb46862f011 100644
--- a/test/install-station-platform-identity.test.ts
+++ b/test/install-station-platform-identity.test.ts
@@ -135,4 +135,50 @@ run_apply
     expect(output).toContain("Expected an NVIDIA GB300 PCI GPU (10de:31c2)");
     expect(output).not.toContain("UNEXPECTED_MUTATION");
   });
+
+  it("rejects forced metadata intent without the exact GB300 PCI identity before mutation (#7138)", () => {
+    const fixtureRoot = fs.mkdtempSync(path.join(os.tmpdir(), "nemoclaw-station-platform-"));
+    const osReleasePath = path.join(fixtureRoot, "os-release");
+    const productNamePath = path.join(fixtureRoot, "product_name");
+    const dgxReleasePath = path.join(fixtureRoot, "dgx-release");
+    const pciRoot = writePciIdentityFixture("0x1234");
+    fs.writeFileSync(
+      osReleasePath,
+      'ID=ubuntu\nVERSION_ID="24.04"\nPRETTY_NAME="Ubuntu 24.04.4 LTS"\n',
+    );
+    fs.writeFileSync(productNamePath, "DGX Station GB300\n");
+    fs.writeFileSync(dgxReleasePath, 'DGX_PRETTY_NAME="Unrecognized Station"\n');
+
+    const { result, output } = runStationPrepare(
+      `
+station_os_release_path() { printf '%s' "$OS_RELEASE_PATH"; }
+station_product_name_path() { printf '%s' "$PRODUCT_NAME_PATH"; }
+station_pci_devices_path() { printf '%s' "$PCI_ROOT"; }
+dgx_station_release_path() { printf '%s' "$DGX_RELEASE_PATH"; }
+dgx_station_release_state() { printf 'unsupported-dgx-os'; }
+uname() {
+  case "$*" in
+    -m) printf 'aarch64' ;;
+    -r) printf 'test-kernel' ;;
+    *) return 1 ;;
+  esac
+}
+require_command() { :; }
+acquire_sudo() { :; }
+install_packages() { printf 'UNEXPECTED_MUTATION\n'; }
+FORCE_STATION_INSTALL=1
+run_apply
+`,
+      {
+        OS_RELEASE_PATH: osReleasePath,
+        PRODUCT_NAME_PATH: productNamePath,
+        PCI_ROOT: pciRoot,
+        DGX_RELEASE_PATH: dgxReleasePath,
+      },
+    );
+
+    expect(result.status, output).not.toBe(0);
+    expect(output).toContain("Expected an NVIDIA GB300 PCI GPU (10de:31c2)");
+    expect(output).not.toContain("UNEXPECTED_MUTATION");
+  });
 });