diff --git a/scripts/patch_vm_boot_order.py b/scripts/patch_vm_boot_order.py
index 9fc88c6..c5a0a8a 100644
--- a/scripts/patch_vm_boot_order.py
+++ b/scripts/patch_vm_boot_order.py
@@ -10,6 +10,7 @@ if not app_path.exists():
 app_dir = app_path.resolve().parent
 template_path = app_dir / 'templates' / 'vm_create.html'
 changed = []
+warnings = []
 
 text = app_path.read_text()
 
@@ -47,65 +48,115 @@ def virt_boot_arg(boot_order: str, is_arm: bool) -> str:
     return value
 '''
 
+def replace_once(source: str, old: str, new: str, label: str) -> str:
+    if old in source:
+        changed.append(label)
+        return source.replace(old, new, 1)
+    warnings.append(f'{label}: marker not found, skipped')
+    return source
+
 if 'def vm_boot_order_options()' not in text:
     marker = '\n\ndef vm_form_context('
-    if marker not in text:
-        raise SystemExit('vm_form_context marker not found')
-    text = text.replace(marker, helpers + marker, 1)
-    changed.append('boot order helpers added')
+    if marker in text:
+        text = text.replace(marker, helpers + marker, 1)
+        changed.append('boot order helpers added')
+    else:
+        warnings.append('vm_form_context marker not found, helpers skipped')
 else:
     changed.append('boot order helpers already present')
 
 if '"boot_options": vm_boot_order_options()' not in text:
-    text = text.replace('"arch_options": vm_arch_options(),', '"arch_options": vm_arch_options(), "boot_options": vm_boot_order_options(),')
-    text = text.replace('"guest_arch": "auto", "network_mode"', '"guest_arch": "auto", "boot_order": "auto", "network_mode"')
-    changed.append('vm form context gets boot options')
+    if '"arch_options": vm_arch_options(),' in text:
+        text = text.replace('"arch_options": vm_arch_options(),', '"arch_options": vm_arch_options(), "boot_options": vm_boot_order_options(),', 1)
+        changed.append('vm form context gets boot options')
+    else:
+        warnings.append('arch_options marker not found, boot_options skipped')
 else:
     changed.append('vm form context already has boot options')
 
+if '"boot_order": "auto"' not in text:
+    if '"guest_arch": "auto", "network_mode"' in text:
+        text = text.replace('"guest_arch": "auto", "network_mode"', '"guest_arch": "auto", "boot_order": "auto", "network_mode"', 1)
+        changed.append('default form boot_order added')
+    elif '"guest_arch": "auto"' in text:
+        text = text.replace('"guest_arch": "auto"', '"guest_arch": "auto", "boot_order": "auto"', 1)
+        changed.append('default form boot_order added near guest_arch')
+    else:
+        warnings.append('default form marker not found, boot_order default skipped')
+else:
+    changed.append('default form boot_order already present')
+
 if 'boot_order: str = Form("auto")' not in text:
-    text = text.replace('guest_arch: str = Form("auto"), network_mode:', 'guest_arch: str = Form("auto"), boot_order: str = Form("auto"), network_mode:', 1)
-    changed.append('vm create signature supports boot order')
+    signature_patterns = [
+        ('guest_arch: str = Form("auto"), network_mode:', 'guest_arch: str = Form("auto"), boot_order: str = Form("auto"), network_mode:'),
+        ('guest_arch: str = Form("auto"),\n    network_mode:', 'guest_arch: str = Form("auto"),\n    boot_order: str = Form("auto"),\n    network_mode:'),
+    ]
+    for old, new in signature_patterns:
+        if old in text:
+            text = text.replace(old, new, 1)
+            changed.append('vm create signature supports boot order')
+            break
+    else:
+        warnings.append('vm create signature marker not found, skipped')
 else:
     changed.append('vm create signature already supports boot order')
 
 if '"boot_order": boot_order' not in text:
-    text = text.replace('"guest_arch": guest_arch, "network_mode"', '"guest_arch": guest_arch, "boot_order": boot_order, "network_mode"', 1)
-    changed.append('vm create form state supports boot order')
+    if '"guest_arch": guest_arch, "network_mode"' in text:
+        text = text.replace('"guest_arch": guest_arch, "network_mode"', '"guest_arch": guest_arch, "boot_order": boot_order, "network_mode"', 1)
+        changed.append('vm create form state supports boot order')
+    elif '"guest_arch": guest_arch' in text:
+        text = text.replace('"guest_arch": guest_arch', '"guest_arch": guest_arch, "boot_order": boot_order', 1)
+        changed.append('vm create form state supports boot order near guest_arch')
+    else:
+        warnings.append('vm create form state marker not found, skipped')
 else:
     changed.append('vm create form state already supports boot order')
 
 if 'boot_order not in ("auto", "disk", "cdrom_disk", "disk_cdrom", "network_disk")' not in text:
-    text = text.replace(
-        'elif guest_arch not in ("auto", "x86_64", "aarch64", "generic"):\n        error = "Некорректная архитектура VM."',
-        'elif guest_arch not in ("auto", "x86_64", "aarch64", "generic"):\n        error = "Некорректная архитектура VM."\n    elif boot_order not in ("auto", "disk", "cdrom_disk", "disk_cdrom", "network_disk"):\n        error = "Некорректный порядок загрузки VM."',
-        1,
-    )
-    changed.append('vm create validation supports boot order')
+    validation_old = 'elif guest_arch not in ("auto", "x86_64", "aarch64", "generic"):\n        error = "Некорректная архитектура VM."'
+    validation_new = validation_old + '\n    elif boot_order not in ("auto", "disk", "cdrom_disk", "disk_cdrom", "network_disk"):\n        error = "Некорректный порядок загрузки VM."'
+    if validation_old in text:
+        text = text.replace(validation_old, validation_new, 1)
+        changed.append('vm create validation supports boot order')
+    else:
+        warnings.append('vm create validation marker not found, skipped')
 else:
     changed.append('vm create validation already supports boot order')
 
 if 'selected_boot_order = normalize_boot_order(boot_order, source_type)' not in text:
-    text = text.replace('selected_arch = normalize_guest_arch(guest_arch, profile)\n', 'selected_arch = normalize_guest_arch(guest_arch, profile)\n    selected_boot_order = normalize_boot_order(boot_order, source_type)\n', 1)
-    changed.append('selected boot order added')
+    if 'selected_arch = normalize_guest_arch(guest_arch, profile)\n' in text:
+        text = text.replace('selected_arch = normalize_guest_arch(guest_arch, profile)\n', 'selected_arch = normalize_guest_arch(guest_arch, profile)\n    selected_boot_order = normalize_boot_order(boot_order, source_type)\n', 1)
+        changed.append('selected boot order added')
+    else:
+        warnings.append('selected_arch marker not found, selected boot order skipped')
 else:
     changed.append('selected boot order already present')
 
-# Replace ARM-specific --boot uefi in architecture block with a later unified --boot argument.
-text = text.replace(', "--boot", "uefi"]', ']')
+# Replace legacy ARM-specific --boot uefi in architecture block with unified --boot argument if present.
+if ', "--boot", "uefi"]' in text:
+    text = text.replace(', "--boot", "uefi"]', ']')
+    changed.append('legacy ARM --boot uefi removed')
 
 if 'cmd += ["--boot", virt_boot_arg(selected_boot_order, is_arm)]' not in text:
     marker = '    if source_type == "disk_image":\n'
-    if marker not in text:
-        raise SystemExit('source_type command marker not found')
-    text = text.replace(marker, '    cmd += ["--boot", virt_boot_arg(selected_boot_order, is_arm)]\n\n' + marker, 1)
-    changed.append('virt-install boot argument added')
+    if marker in text:
+        text = text.replace(marker, '    cmd += ["--boot", virt_boot_arg(selected_boot_order, is_arm)]\n\n' + marker, 1)
+        changed.append('virt-install boot argument added')
+    else:
+        warnings.append('source_type command marker not found, boot argument skipped')
 else:
     changed.append('virt-install boot argument already present')
 
 if '"boot_order": selected_boot_order' not in text:
-    text = text.replace('"guest_arch": selected_arch, "host_profile"', '"guest_arch": selected_arch, "boot_order": selected_boot_order, "host_profile"')
-    changed.append('operation metadata gets boot order')
+    if '"guest_arch": selected_arch, "host_profile"' in text:
+        text = text.replace('"guest_arch": selected_arch, "host_profile"', '"guest_arch": selected_arch, "boot_order": selected_boot_order, "host_profile"', 1)
+        changed.append('operation metadata gets boot order')
+    elif '"guest_arch": selected_arch' in text:
+        text = text.replace('"guest_arch": selected_arch', '"guest_arch": selected_arch, "boot_order": selected_boot_order', 1)
+        changed.append('operation metadata gets boot order near guest_arch')
+    else:
+        warnings.append('operation metadata marker not found, skipped')
 else:
     changed.append('operation metadata already has boot order')
 
@@ -117,21 +168,28 @@ if template_path.exists():
 
     if 'name="boot_order"' not in tpl:
         insert = r'''
-          <label>
-            <span>Порядок загрузки</span>
-            <select name="boot_order" required>
-              {% for boot in boot_options %}
-                <option value="{{ boot.value }}" {% if form.boot_order == boot.value %}selected{% endif %}>{{ boot.label }}</option>
-              {% endfor %}
-            </select>
-          </label>
+            <label>
+              <span>Порядок загрузки</span>
+              <select name="boot_order" required>
+                {% for boot in boot_options %}
+                  <option value="{{ boot.value }}" {% if form.boot_order == boot.value %}selected{% endif %}>{{ boot.label }}</option>
+                {% endfor %}
+              </select>
+            </label>
 '''
-        marker = '''          <label>
-            <span>Режим сети</span>'''
-        if marker not in tpl:
-            raise SystemExit('network mode marker not found in vm_create.html')
-        tpl = tpl.replace(marker, insert + '\n' + marker, 1)
-        changed.append('boot order field added to vm_create.html')
+        markers = [
+            '            <label>\n              <span>Режим сети</span>',
+            '          <label>\n            <span>Режим сети</span>',
+        ]
+        for marker in markers:
+            if marker in tpl:
+                tpl = tpl.replace(marker, insert + '\n' + marker, 1)
+                changed.append('boot order field added to vm_create.html')
+                break
+        else:
+            warnings.append('network mode marker not found in vm_create.html, boot field skipped')
+    else:
+        changed.append('boot order field already present in vm_create.html')
 
     tpl = tpl.replace(
         'Virtuality импортирует .img/.raw/.qcow2 в новый qcow2-диск VM. Поле “Диск, GB” не используется.',
@@ -144,7 +202,13 @@ if template_path.exists():
 
     if tpl != original:
         template_path.write_text(tpl)
+else:
+    warnings.append(f'vm_create.html not found: {template_path}')
 
 print('VM boot order patch applied:')
 for item in changed:
     print(f'- {item}')
+if warnings:
+    print('Warnings:')
+    for item in warnings:
+        print(f'- {item}')