diff --git a/homeassistant/components/enocean/switch.py b/homeassistant/components/enocean/switch.py
index a53f691df19..5edd2bb6155 100644
--- a/homeassistant/components/enocean/switch.py
+++ b/homeassistant/components/enocean/switch.py
@@ -5,12 +5,14 @@ from enocean.utils import combine_hex
 import voluptuous as vol
 
 from homeassistant.components.switch import PLATFORM_SCHEMA, SwitchEntity
-from homeassistant.const import CONF_ID, CONF_NAME
+from homeassistant.const import CONF_ID, CONF_NAME, Platform
 from homeassistant.core import HomeAssistant
+from homeassistant.helpers import entity_registry
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
+from .const import DOMAIN, LOGGER
 from .device import EnOceanEntity
 
 CONF_CHANNEL = "channel"
@@ -25,10 +27,40 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-def setup_platform(
+def generate_unique_id(dev_id: list[int], channel: int) -> str:
+    """Generate a valid unique id."""
+    return f"{combine_hex(dev_id)}-{channel}"
+
+
+def _migrate_to_new_unique_id(hass: HomeAssistant, dev_id, channel) -> None:
+    """Migrate old unique ids to new unique ids."""
+    old_unique_id = f"{combine_hex(dev_id)}"
+
+    ent_reg = entity_registry.async_get(hass)
+    entity_id = ent_reg.async_get_entity_id(Platform.SWITCH, DOMAIN, old_unique_id)
+
+    if entity_id is not None:
+        new_unique_id = generate_unique_id(dev_id, channel)
+        try:
+            ent_reg.async_update_entity(entity_id, new_unique_id=new_unique_id)
+        except ValueError:
+            LOGGER.warning(
+                "Skip migration of id [%s] to [%s] because it already exists",
+                old_unique_id,
+                new_unique_id,
+            )
+        else:
+            LOGGER.debug(
+                "Migrating unique_id from [%s] to [%s]",
+                old_unique_id,
+                new_unique_id,
+            )
+
+
+async def async_setup_platform(
     hass: HomeAssistant,
     config: ConfigType,
-    add_entities: AddEntitiesCallback,
+    async_add_entities: AddEntitiesCallback,
     discovery_info: DiscoveryInfoType | None = None,
 ) -> None:
     """Set up the EnOcean switch platform."""
@@ -36,7 +68,8 @@ def setup_platform(
     dev_id = config.get(CONF_ID)
     dev_name = config.get(CONF_NAME)
 
-    add_entities([EnOceanSwitch(dev_id, dev_name, channel)])
+    _migrate_to_new_unique_id(hass, dev_id, channel)
+    async_add_entities([EnOceanSwitch(dev_id, dev_name, channel)])
 
 
 class EnOceanSwitch(EnOceanEntity, SwitchEntity):
@@ -49,7 +82,7 @@ class EnOceanSwitch(EnOceanEntity, SwitchEntity):
         self._on_state = False
         self._on_state2 = False
         self.channel = channel
-        self._attr_unique_id = f"{combine_hex(dev_id)}"
+        self._attr_unique_id = generate_unique_id(dev_id, channel)
 
     @property
     def is_on(self):
diff --git a/tests/components/enocean/test_switch.py b/tests/components/enocean/test_switch.py
new file mode 100644
index 00000000000..a7aafa6fc73
--- /dev/null
+++ b/tests/components/enocean/test_switch.py
@@ -0,0 +1,73 @@
+"""Tests for the EnOcean switch platform."""
+
+from enocean.utils import combine_hex
+
+from homeassistant.components.enocean import DOMAIN as ENOCEAN_DOMAIN
+from homeassistant.components.switch import DOMAIN as SWITCH_DOMAIN
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import entity_registry as er
+from homeassistant.setup import async_setup_component
+
+from tests.common import MockConfigEntry, assert_setup_component
+
+SWITCH_CONFIG = {
+    "switch": [
+        {
+            "platform": ENOCEAN_DOMAIN,
+            "id": [0xDE, 0xAD, 0xBE, 0xEF],
+            "channel": 1,
+            "name": "room0",
+        },
+    ]
+}
+
+
+async def test_unique_id_migration(hass: HomeAssistant) -> None:
+    """Test EnOcean switch ID migration."""
+
+    entity_name = SWITCH_CONFIG["switch"][0]["name"]
+    switch_entity_id = f"{SWITCH_DOMAIN}.{entity_name}"
+    dev_id = SWITCH_CONFIG["switch"][0]["id"]
+    channel = SWITCH_CONFIG["switch"][0]["channel"]
+
+    ent_reg = er.async_get(hass)
+
+    old_unique_id = f"{combine_hex(dev_id)}"
+
+    entry = MockConfigEntry(domain=ENOCEAN_DOMAIN, data={"device": "/dev/null"})
+
+    entry.add_to_hass(hass)
+
+    # Add a switch with an old unique_id to the entity registry
+    entity_entry = ent_reg.async_get_or_create(
+        SWITCH_DOMAIN,
+        ENOCEAN_DOMAIN,
+        old_unique_id,
+        suggested_object_id=entity_name,
+        config_entry=entry,
+        original_name=entity_name,
+    )
+
+    assert entity_entry.entity_id == switch_entity_id
+    assert entity_entry.unique_id == old_unique_id
+
+    # Now add the sensor to check, whether the old unique_id is migrated
+
+    with assert_setup_component(1, SWITCH_DOMAIN):
+        assert await async_setup_component(
+            hass,
+            SWITCH_DOMAIN,
+            SWITCH_CONFIG,
+        )
+
+    await hass.async_block_till_done()
+
+    # Check that new entry has a new unique_id
+    entity_entry = ent_reg.async_get(switch_entity_id)
+    new_unique_id = f"{combine_hex(dev_id)}-{channel}"
+
+    assert entity_entry.unique_id == new_unique_id
+    assert (
+        ent_reg.async_get_entity_id(SWITCH_DOMAIN, ENOCEAN_DOMAIN, old_unique_id)
+        is None
+    )