diff --git a/homeassistant/components/smlight/config_flow.py b/homeassistant/components/smlight/config_flow.py
index dee81264fa4..34bd0758174 100644
--- a/homeassistant/components/smlight/config_flow.py
+++ b/homeassistant/components/smlight/config_flow.py
@@ -10,7 +10,7 @@ from pysmlight.const import Devices
 from pysmlight.exceptions import SmlightAuthError, SmlightConnectionError
 import voluptuous as vol
 
-from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
+from homeassistant.config_entries import SOURCE_USER, ConfigFlow, ConfigFlowResult
 from homeassistant.const import CONF_HOST, CONF_NAME, CONF_PASSWORD, CONF_USERNAME
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 from homeassistant.helpers.device_registry import format_mac
@@ -36,10 +36,7 @@ class SmlightConfigFlow(ConfigFlow, domain=DOMAIN):
     """Handle a config flow for SMLIGHT Zigbee."""
 
     host: str
-
-    def __init__(self) -> None:
-        """Initialize the config flow."""
-        self.client: Api2
+    client: Api2
 
     async def async_step_user(
         self, user_input: dict[str, Any] | None = None
@@ -199,7 +196,10 @@ class SmlightConfigFlow(ConfigFlow, domain=DOMAIN):
         self, user_input: dict[str, Any]
     ) -> ConfigFlowResult:
         info = await self.client.get_info()
-        await self.async_set_unique_id(format_mac(info.MAC))
+
+        await self.async_set_unique_id(
+            format_mac(info.MAC), raise_on_progress=self.source != SOURCE_USER
+        )
         self._abort_if_unique_id_configured()
 
         if user_input.get(CONF_HOST) is None:
diff --git a/tests/components/smlight/test_config_flow.py b/tests/components/smlight/test_config_flow.py
index c4aea195aa7..4dad06b0fa3 100644
--- a/tests/components/smlight/test_config_flow.py
+++ b/tests/components/smlight/test_config_flow.py
@@ -261,6 +261,44 @@ async def test_user_device_exists_abort(
     assert result["reason"] == "already_configured"
 
 
+@pytest.mark.usefixtures("mock_smlight_client")
+async def test_user_flow_can_override_discovery(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_setup_entry: AsyncMock,
+) -> None:
+    """Test manual user flow can override discovery in progress."""
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": SOURCE_ZEROCONF}, data=DISCOVERY_INFO
+    )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "confirm_discovery"
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": SOURCE_USER}
+    )
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == SOURCE_USER
+    assert result["errors"] == {}
+
+    result2 = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        {
+            CONF_HOST: MOCK_HOST,
+        },
+    )
+
+    assert result2["type"] is FlowResultType.CREATE_ENTRY
+    assert result2["context"]["source"] == SOURCE_USER
+    assert result2["data"] == {
+        CONF_HOST: MOCK_HOST,
+    }
+    assert result2["context"]["unique_id"] == "aa:bb:cc:dd:ee:ff"
+    assert len(mock_setup_entry.mock_calls) == 1
+
+
 @pytest.mark.usefixtures("mock_smlight_client")
 async def test_zeroconf_device_exists_abort(
     hass: HomeAssistant, mock_config_entry: MockConfigEntry