diff --git a/homeassistant/components/sandbox/proxy_flow.py b/homeassistant/components/sandbox/proxy_flow.py
index 251d14283ec5..f70e361ee3b1 100644
--- a/homeassistant/components/sandbox/proxy_flow.py
+++ b/homeassistant/components/sandbox/proxy_flow.py
@@ -193,7 +193,21 @@ class SandboxFlowProxy(ConfigFlow):
 
         if result_type is FlowResultType.CREATE_ENTRY:
             entry_data = struct_to_dict(result.data)
+            options = (
+                struct_to_dict(result.options) if result.HasField("options") else None
+            )
             self._terminated = True
+            # ``async_create_entry`` stamps the created result's
+            # ``version``/``minor_version`` from ``self.VERSION``/
+            # ``self.MINOR_VERSION`` (read off the instance, not the class —
+            # see ``ConfigFlow.async_create_entry``). Override the proxy
+            # instance's values with the sandbox flow's so the entry carries
+            # the integration's real schema version; otherwise the proxy's
+            # default ``VERSION=1`` triggers a spurious migration on next setup.
+            if result.HasField("version"):
+                self.VERSION = result.version
+            if result.HasField("minor_version"):
+                self.MINOR_VERSION = result.minor_version
             create_result = self.async_create_entry(
                 title=(
                     result.title
@@ -205,6 +219,7 @@ class SandboxFlowProxy(ConfigFlow):
                     result.description if result.HasField("description") else None
                 ),
                 description_placeholders=placeholders,
+                options=options,
             )
             # Tag the FlowResult so the framework's entry constructor in
             # ``ConfigEntriesFlowManager.async_finish_flow`` reads it into
diff --git a/sandbox/hass_client/tests/test_flow_runner.py b/sandbox/hass_client/tests/test_flow_runner.py
index 5109733a4558..cac00456c6ec 100644
--- a/sandbox/hass_client/tests/test_flow_runner.py
+++ b/sandbox/hass_client/tests/test_flow_runner.py
@@ -78,6 +78,22 @@ class _DemoFlow(ConfigFlow, domain="phase4_demo"):
         )
 
 
+class _VersionedFlow(ConfigFlow, domain="phase4_versioned"):
+    """A one-step flow with a non-default VERSION/MINOR_VERSION and options."""
+
+    VERSION = 2
+    MINOR_VERSION = 3
+
+    async def async_step_user(
+        self, user_input: dict[str, Any] | None = None
+    ) -> ConfigFlowResult:
+        return self.async_create_entry(
+            title="Versioned",
+            data={"host": "1.2.3.4"},
+            options={"poll_interval": 30},
+        )
+
+
 @pytest.fixture(name="channels")
 async def _channels_fixture() -> tuple[Channel, Channel]:
     main, sandbox = _make_channel_pair()
@@ -162,6 +178,40 @@ async def test_flow_step_creates_entry(
     assert struct_to_dict(step_result.data) == {"host": "1.2.3.4"}
 
 
+async def test_create_entry_marshals_version_and_options(
+    channels: tuple[Channel, Channel], runner: FlowRunner
+) -> None:
+    """CREATE_ENTRY carries the flow's VERSION/MINOR_VERSION/options on the wire."""
+    main, sandbox = channels
+    runner.register(sandbox)
+    main.start()
+    sandbox.start()
+
+    ha_config_entries.HANDLERS["phase4_versioned"] = _VersionedFlow
+    fake_module = ModuleType("homeassistant.components.phase4_versioned")
+    fake_flow_module = ModuleType("homeassistant.components.phase4_versioned.config_flow")
+    runner.hass.data[ha_loader.DATA_COMPONENTS]["phase4_versioned"] = fake_module
+    runner.hass.data[ha_loader.DATA_COMPONENTS]["phase4_versioned.config_flow"] = (
+        fake_flow_module
+    )
+    runner.hass.config.components.add("phase4_versioned")
+    try:
+        init_msg = pb.FlowInit(handler="phase4_versioned")
+        init_msg.context.update({"source": "user"})
+        result = await main.call("sandbox/flow_init", init_msg)
+    finally:
+        ha_config_entries.HANDLERS.pop("phase4_versioned", None)
+        runner.hass.data[ha_loader.DATA_COMPONENTS].pop("phase4_versioned", None)
+        runner.hass.data[ha_loader.DATA_COMPONENTS].pop(
+            "phase4_versioned.config_flow", None
+        )
+
+    assert result.type == "create_entry"
+    assert result.version == 2
+    assert result.minor_version == 3
+    assert struct_to_dict(result.options) == {"poll_interval": 30}
+
+
 async def test_flow_step_validation_error_returns_form(
     channels: tuple[Channel, Channel], runner: FlowRunner
 ) -> None:
diff --git a/tests/components/sandbox/test_proxy_flow.py b/tests/components/sandbox/test_proxy_flow.py
index 6ae00e8a36d5..783e640f6e75 100644
--- a/tests/components/sandbox/test_proxy_flow.py
+++ b/tests/components/sandbox/test_proxy_flow.py
@@ -12,6 +12,7 @@ from homeassistant.components.sandbox._proto import sandbox_pb2 as pb
 from homeassistant.components.sandbox.channel import Channel
 from homeassistant.components.sandbox.manager import SandboxManager
 from homeassistant.components.sandbox.messages import struct_to_dict
+from homeassistant.components.sandbox.proxy_flow import SandboxFlowProxy
 from homeassistant.components.sandbox.router import SandboxFlowRouter
 from homeassistant.config_entries import SOURCE_USER, ConfigEntryState
 from homeassistant.core import HomeAssistant
@@ -166,6 +167,55 @@ async def test_full_flow_user_to_create_entry(
     assert entries[0].state is ConfigEntryState.LOADED
 
 
+async def test_create_entry_carries_version_and_options(
+    hass: HomeAssistant, manager: FakeSandboxManager
+) -> None:
+    """A sandbox CREATE_ENTRY with VERSION/MINOR_VERSION/options round-trips.
+
+    Pins the framework behaviour the fix relies on: ``async_create_entry``
+    reads ``self.VERSION``/``self.MINOR_VERSION`` off the proxy *instance*,
+    so overriding them before the call lands the integration's real schema
+    version on the entry (instead of the proxy class default ``VERSION=1``,
+    which would trigger a spurious migration on next setup).
+    """
+    mock_integration(hass, MockModule("test_proxy_full"))
+    create_entry = pb.FlowResult(
+        type=FlowResultType.CREATE_ENTRY.value,
+        flow_id="sandbox-flow-ver",
+        handler="test_proxy_full",
+        title="Versioned",
+        version=2,
+        minor_version=3,
+    )
+    create_entry.data.update({"host": "1.2.3.4"})
+    create_entry.options.update({"poll_interval": 30})
+    responses = [create_entry]
+
+    with (
+        _wired_sandbox(manager, group="built-in", responses=responses),
+        patch(
+            "homeassistant.components.sandbox.router.classify",
+            return_value=type("A", (), {"is_main": False, "group": "built-in"})(),
+        ),
+    ):
+        await _install_router(hass, manager)
+        # The proxy class default is VERSION=1 — the entry must NOT inherit it.
+        assert SandboxFlowProxy.VERSION == 1
+        result = await hass.config_entries.flow.async_init(
+            "test_proxy_full", context={"source": SOURCE_USER}
+        )
+        await hass.async_block_till_done()
+
+    assert result["type"] is FlowResultType.CREATE_ENTRY
+    entries = hass.config_entries.async_entries("test_proxy_full")
+    assert len(entries) == 1
+    entry = entries[0]
+    assert entry.version == 2
+    assert entry.minor_version == 3
+    assert entry.options == {"poll_interval": 30}
+    assert entry.data == {"host": "1.2.3.4"}
+
+
 async def test_form_with_errors_reshows(
     hass: HomeAssistant, manager: FakeSandboxManager
 ) -> None:
diff --git a/tests/testing_config/.storage/sandbox/built-in/demo_key b/tests/testing_config/.storage/sandbox/built-in/demo_key
new file mode 100644
index 000000000000..61d0a7c58601
--- /dev/null
+++ b/tests/testing_config/.storage/sandbox/built-in/demo_key
@@ -0,0 +1,8 @@
+{
+  "data": {
+    "counter": 42
+  },
+  "version": 2,
+  "minor_version": 3,
+  "key": "demo_key"
+}
\ No newline at end of file
diff --git a/tests/testing_config/.storage/sandbox/built-in/persistent b/tests/testing_config/.storage/sandbox/built-in/persistent
new file mode 100644
index 000000000000..d12ed650dc9e
--- /dev/null
+++ b/tests/testing_config/.storage/sandbox/built-in/persistent
@@ -0,0 +1,8 @@
+{
+  "data": {
+    "survives": true
+  },
+  "version": 4,
+  "minor_version": 0,
+  "key": "persistent"
+}
\ No newline at end of file
diff --git a/tests/testing_config/.storage/sandbox/built-in/shared_key b/tests/testing_config/.storage/sandbox/built-in/shared_key
new file mode 100644
index 000000000000..d0e0b62b1bba
--- /dev/null
+++ b/tests/testing_config/.storage/sandbox/built-in/shared_key
@@ -0,0 +1,8 @@
+{
+  "data": {
+    "side": "built-in"
+  },
+  "version": 1,
+  "minor_version": 1,
+  "key": "shared_key"
+}
\ No newline at end of file