Warn message when reading Blitzwolf bw-sph6 powerplug with Tasmota via MQTT

I am running on a Raspberry Pi openhabian 2.5.4-1.
Last week I received my Blitzwolf BW SPH-6 smart plugs, flashed them with Tasmoto.
With reading through a lot of topics I was able to set-up an item, thing etc.
I am able to show several items.

Now i do see in the log that it is not 100% clean but I do not have any clue how to resolve it. The warning showes: not supported by type ‘OnOffValue’: No enum constant org.eclipse.smarthome.core.library.types.OnOffType.

2020-05-01 21:39:08.067 [WARN ] [ab.binding.mqtt.generic.ChannelState] - Command '{"Time":"2020-05-01T20:39:07","Uptime":"0T00:51:26","UptimeSec":3086,"Heap":26,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":19,"MqttCount":1,"POWER":"ON","Wifi":{"AP":1,"SSId":"localhost","BSSId":"xx;xx;xx:xx;xx;xx","Channel":6,"RSSI":56,"Signal":-72,"LinkCount":1,"Downtime":"0T00:00:06"}}' not supported by type 'OnOffValue': No enum constant org.eclipse.smarthome.core.library.types.OnOffType.{"Time":"2020-05-01T20:39:07","Uptime":"0T00:51:26","UptimeSec":3086,"Heap":26,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":19,"MqttCount":1,"POWER":"ON","Wifi":{"AP":1,"SSId":"localhost","BSSId":"76:83:C2:AA:2B:C4","Channel":6,"RSSI":56,"Signal":-72,"LinkCount":1,"Downtime":"0T00:00:06"}}

My mqtt.things file looks like this.

Bridge mqtt:broker:MQTTbroker "MQTT Broker" [ host="localhost", port=1883, secure=false]
{
    // Tasmota
    Thing topic Tasmota_Quooker "Tasmota_Quooker" @ "Dark Room" {
    Channels:
        Type switch : Tasmota_Quooker     "Power"  [ stateTopic="tele/Tasmota_Quooker/STATE", transformationPattern="JSONPATH:$.POWER" ,commandTopic="cmnd/Tasmota_Quooker/POWER", on="ON", off="OFF"  ]
        Type string : Reachable_qk "Reachable"       [ stateTopic="tele/Tasmota_Quooker/LWT" ]
        Type string : Rssi_qk      "Wifi Strenght" [ stateTopic="tele/Tasmota_Quooker/STATE", transformationPattern="JSONPATH:$.Wifi.RSSI" ]
        Type number : Total_qk  "Total energy alltime"     [ stateTopic="tele/Tasmota_Quooker/SENSOR", transformationPattern="JSONPATH:$.ENERGY.Total" ]
        Type number : Today_qk  "Energie Vandaag"     [ stateTopic="tele/Tasmota_Quooker/SENSOR", transformationPattern="JSONPATH:$.ENERGY.Today" ]
        Type number : Yesterday_qk  "Energie Gisteren"     [ stateTopic="tele/Tasmota_Quooker/SENSOR", transformationPattern="JSONPATH:$.ENERGY.Yesterday" ]
        Type number : Voltage_qk  "Voltage"     [ stateTopic="tele/Tasmota_Quooker/SENSOR", transformationPattern="JSONPATH:$.ENERGY.Voltage" ]
        Type number : Current_qk  "Current"     [ stateTopic="tele/Tasmota_Quooker/SENSOR", transformationPattern="JSONPATH:$.ENERGY.Current" ]
   
    }
I recently added to the things file at type switch this : 
```csv
transformationPattern="JSONPATH:$.POWER" , on="ON", off="OFF"

The items file like this:

// Blitzwolf BW-SHP6 #Quooker                                                        
Group Quooker <water>
Switch Tasmota_Quooker 	"Quooker"             (Quooker)     { channel="mqtt:topic:MQTTbroker:Tasmota_Quooker:Tasmota_Quooker" }
String Reachable_qk    "Reachable"       (Quooker)      { channel="mqtt:topic:MQTTbroker:Tasmota_Quooker:reachable"}
String Rssi_qk         "Wifi Strength [%d %%]" <network>  (Quooker)      { channel="mqtt:topic:MQTTbroker:Tasmota_Quooker:Rssi"}
Number Total_qk  "Total energy alltime [%.3f kWh]"       <Energy> (Quooker) { channel="mqtt:topic:MQTTbroker:Tasmota_Quooker:ENERGY.Total"}
Number Today_qk "Energie Vandaag: [%.3f kWh]"  <Energy> (Quooker) { channel="mqtt:topic:MQTTbroker:Tasmota_Quooker:ENERGY.Today)]" }
Number Yesterday_qk "Energie Gisteren: [%.3f kWh]"  <Energy> (Quooker) { channel="mqtt:topic:MQTTbroker:Tasmota_Quooker:ENERGY.Yesterday)]" }
Number Voltage_qk "Voltage: [%.1f V]"  <Energy> (Quooker) { channel="mqtt:topic:MQTTbroker:Tasmota_Quooker:ENERGY.Voltage)]" }
Number Current_qk "Current: [%.2f A]"  <Energy> (Quooker) { channel="mqtt:topic:MQTTbroker:Tasmota_Quooker:ENERGY.Current)]" }

On the sitemap I only created a Group item=Quooker

If more info is required please let me know, more than happy to add it to the topic.