I has the issue as well, once i changed to the correct thing config, the errors are gone:
Bridge mihome:bridge:34ce00000000 "Xiaomi Gateway Bridge" @ "Eerste verdieping" [serialNumber="34ce00000000", ipAddress="IPADDRESS", port=9898, key="KEY", pollingInterval=1000 ] {
Things:
sensor_magnet 158d00016fd9xx "Xiaomi Door Sensor Voordeur" @ "Begane grond" [itemId="158d00016fd9xx"]
gateway 34ce00907exx "Xiaomi Mi Smart Home Gateway" @ "Eerste verdieping" [itemId="34ce00907exx"]
sensor_motion 158d00015e7bxx "Xiaomi Motion Sensor Overloop" @ "Zolder" [itemId="158d00015e7bxx"]
sensor_motion 158d000121c4xx "Xiaomi Motion Sensor Kantoor" @ "Eerste verdieping" [itemId="158d000121c4xx"]
sensor_motion_aq2 158d00016db7xx "Xiaomi Motion Sensor Keuken" @ "Begane grond" [itemId="158d00016db7xx"]
sensor_magnet 158d0001d839xx "Xiaomi Door Sensor Achterdeur" @ "Begane grond" [itemId="158d0001d839xx"]
sensor_magnet 158d00019fe7xx "Xiaomi Door Sensor Kantoor" @ "Eerste verdieping" [itemId="158d00019fe7xx"]
sensor_magnet 158d0001d825xx "Xiaomi Door Sensor Spacecave" @ "Zolder" [itemId="158d0001d825xx"]
sensor_weather_v1 158d0001e412xx "Xiaomi Temp/humid/baro Sensor Keuken" @ "Begane grond" [itemId="158d0001e412xx"]
sensor_switch 158d00016c0axx "Xiaomi Mi Wireless Switch Kantoor" @ "Eerste verdieping" [itemId="158d00016c0axx"]
}