Logger: homeassistant.components.sensor
Source: helpers/entity_platform.py:680
Integration: Sensor (documentation, issues)
First occurred: 11:08:06 AM (1 occurrence)
Last logged: 11:08:06 AM
Error adding entity sensor.synologyds923_last_boot for domain sensor with platform synology_dsm
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/components/sensor/__init__.py", line 644, in state
if value.tzinfo is None:
^^^^^^^^^^^^
AttributeError: 'int' object has no attribute 'tzinfo'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 680, in _async_add_entities
await self._async_add_entity(
entity, False, entity_registry, config_subentry_id
)
File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 1010, in _async_add_entity
await entity.add_to_platform_finish()
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1435, in add_to_platform_finish
self.async_write_ha_state()
~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1054, in async_write_ha_state
self._async_write_ha_state()
~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1203, in _async_write_ha_state
) = self.__async_calculate_state()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1110, in __async_calculate_state
state = self._stringify_state(available)
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1060, in _stringify_state
if (state := self.state) is None:
^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/components/sensor/__init__.py", line 658, in state
raise ValueError(
...<2 lines>...
) from err
ValueError: Invalid datetime: sensor.synologyds923_last_boot has uptime device class but provides state 3490165:<class 'int'> resulting in ''int' object has no attribute 'tzinfo''
Integration appears to be working fine, hownever.
The problem
Hello,
Updated to 2026.5.0b0 on HAOS/bare-metal NUC and received this log error:
Integration appears to be working fine, hownever.
What version of Home Assistant Core has the issue?
2026.5.0b0
What was the last working version of Home Assistant Core?
2026.4.x
What type of installation are you running?
Home Assistant OS
Integration causing the issue
Synology DSM
Link to integration documentation on our website
https://www.home-assistant.io/integrations/synology_dsm/
Diagnostics information
No response
Example YAML snippet
Anything in the logs that might be useful for us?
Additional information
No response