Duplicate homematic_error_set

[fbrnc]

Prometheus started showing this in the log:

ts=2025-01-05T14:50:53.478Z caller=scrape.go:1820 level=warn component="scrape manager" scrape_pool=homematic-exporter target=http://homematic-exporter:8010/metrics msg="Error on ingesting samples with different value but same timestamp" num_dropped=5

And indeed the exporter contains duplicate lines:

curl -s localhost:8010/metrics | grep homematic_error_set
# HELP homematic_error_set Metrics for ERROR
# TYPE homematic_error_set gauge
homematic_error_set{ccu="192.168.1.171",device="...:1",device_type="SHUTTER_CONTACT",homematic_error_set="NO_ERROR",mapped_name="Haustuer",parent_device_type="HM-Sec-SCo"} 1.0
homematic_error_set{ccu="192.168.1.171",device="...:1",device_type="SHUTTER_CONTACT",homematic_error_set="",mapped_name="Haustuer",parent_device_type="HM-Sec-SCo"} 0.0
homematic_error_set{ccu="192.168.1.171",device="...:1",device_type="SHUTTER_CONTACT",homematic_error_set="",mapped_name="Haustuer",parent_device_type="HM-Sec-SCo"} 0.0
homematic_error_set{ccu="192.168.1.171",device="...:1",device_type="SHUTTER_CONTACT",homematic_error_set="",mapped_name="Haustuer",parent_device_type="HM-Sec-SCo"} 0.0
homematic_error_set{ccu="192.168.1.171",device="...:1",device_type="SHUTTER_CONTACT",homematic_error_set="",mapped_name="Haustuer",parent_device_type="HM-Sec-SCo"} 0.0
homematic_error_set{ccu="192.168.1.171",device="...:1",device_type="SHUTTER_CONTACT",homematic_error_set="",mapped_name="Haustuer",parent_device_type="HM-Sec-SCo"} 0.0
homematic_error_set{ccu="192.168.1.171",device="...:1",device_type="SHUTTER_CONTACT",homematic_error_set="",mapped_name="Haustuer",parent_device_type="HM-Sec-SCo"} 0.0
homematic_error_set{ccu="192.168.1.171",device="...:1",device_type="SHUTTER_CONTACT",homematic_error_set="SABOTAGE",mapped_name="Haustuer",parent_device_type="HM-Sec-SCo"} 0.0

I'm not sure what's causing this and I couldn't figure out how the homematic_error_set is written in the exporter.py file.