diff --git a/homeassistant/components/home_connect/__init__.py b/homeassistant/components/home_connect/__init__.py
index becc78cef90..9f88c6eec68 100644
--- a/homeassistant/components/home_connect/__init__.py
+++ b/homeassistant/components/home_connect/__init__.py
@@ -378,5 +378,8 @@ async def async_migrate_entry(
 
         hass.config_entries.async_update_entry(entry, minor_version=2)
 
+    if entry.version == 1 and entry.minor_version == 2:
+        hass.config_entries.async_update_entry(entry, minor_version=3, unique_id=DOMAIN)
+
     _LOGGER.debug("Migration to version %s successful", entry.version)
     return True
diff --git a/homeassistant/components/home_connect/config_flow.py b/homeassistant/components/home_connect/config_flow.py
index 444ea24cb6b..37d6efd4a91 100644
--- a/homeassistant/components/home_connect/config_flow.py
+++ b/homeassistant/components/home_connect/config_flow.py
@@ -2,6 +2,7 @@
 
 import logging
 
+from homeassistant.config_entries import ConfigFlowResult
 from homeassistant.helpers import config_entry_oauth2_flow
 
 from .const import DOMAIN
@@ -14,9 +15,16 @@ class OAuth2FlowHandler(
 
     DOMAIN = DOMAIN
 
-    MINOR_VERSION = 2
+    MINOR_VERSION = 3
 
     @property
     def logger(self) -> logging.Logger:
         """Return logger."""
         return logging.getLogger(__name__)
+
+    async def async_oauth_create_entry(self, data: dict) -> ConfigFlowResult:
+        """Create an entry for Electric Kiwi."""
+        existing_entry = await self.async_set_unique_id(DOMAIN)
+        if existing_entry:
+            return self.async_update_reload_and_abort(existing_entry, data=data)
+        return await super().async_oauth_create_entry(data)
diff --git a/tests/components/home_connect/conftest.py b/tests/components/home_connect/conftest.py
index ae98c69d242..2342995b749 100644
--- a/tests/components/home_connect/conftest.py
+++ b/tests/components/home_connect/conftest.py
@@ -84,7 +84,8 @@ def mock_config_entry(token_entry: dict[str, Any]) -> MockConfigEntry:
             "auth_implementation": FAKE_AUTH_IMPL,
             "token": token_entry,
         },
-        minor_version=2,
+        minor_version=3,
+        unique_id=DOMAIN,
     )
 
 
@@ -101,6 +102,19 @@ def mock_config_entry_v1_1(token_entry: dict[str, Any]) -> MockConfigEntry:
     )
 
 
+@pytest.fixture(name="config_entry_v1_2")
+def mock_config_entry_v1_2(token_entry: dict[str, Any]) -> MockConfigEntry:
+    """Fixture for a config entry."""
+    return MockConfigEntry(
+        domain=DOMAIN,
+        data={
+            "auth_implementation": FAKE_AUTH_IMPL,
+            "token": token_entry,
+        },
+        minor_version=2,
+    )
+
+
 @pytest.fixture
 async def setup_credentials(hass: HomeAssistant) -> None:
     """Fixture to setup credentials."""
diff --git a/tests/components/home_connect/test_init.py b/tests/components/home_connect/test_init.py
index b3d1c4e531f..6534425b329 100644
--- a/tests/components/home_connect/test_init.py
+++ b/tests/components/home_connect/test_init.py
@@ -406,7 +406,29 @@ async def test_entity_migration(
         assert entity_registry.async_get_entity_id(
             domain, DOMAIN, f"{appliance_ha_id}-{expected_unique_id_suffix}"
         )
-    assert config_entry_v1_1.minor_version == 2
+    assert config_entry_v1_1.minor_version == 3
+    assert config_entry_v1_1.unique_id == DOMAIN
+
+
+async def test_entry_migration(
+    hass: HomeAssistant,
+    device_registry: dr.DeviceRegistry,
+    entity_registry: er.EntityRegistry,
+    config_entry_v1_2: MockConfigEntry,
+    appliance_ha_id: str,
+    platforms: list[Platform],
+) -> None:
+    """Test entity migration."""
+
+    config_entry_v1_2.add_to_hass(hass)
+    assert config_entry_v1_2.unique_id != DOMAIN
+
+    with patch("homeassistant.components.home_connect.PLATFORMS", platforms):
+        await hass.config_entries.async_setup(config_entry_v1_2.entry_id)
+        await hass.async_block_till_done()
+
+    assert config_entry_v1_2.minor_version == 3
+    assert config_entry_v1_2.unique_id == DOMAIN
 
 
 async def test_bsh_key_transformations() -> None: