Openhab echoes KNX messages

I am using openhab 5.0.3 docker with knx. In the ETS logs I found that if a scene command is sent to the bus, openhab echoes that message and sends it back to the bus. Below an example of receiveing scene 49 and 61.

I tried with openhab not running → no echoes.
I tried with all scripts and rules disabeld, in case I did some mistake that makes a rule/script send the echo → openhab still echoes.

Could somebody give me a hint towards my mistake in setup?

line_horizontal_3 20:13:30.535 TRACE org.openhab.binding.knx.internal.channel.KNXChannel getCommandSpec checking keys ‘[ga]’ for command ‘49.0’ (class org.openhab.core.library.types.DecimalType)
line_horizontal_3 20:13:30.535 TRACE org.openhab.binding.knx.internal.channel.KNXChannel getCommandSpec key ‘ga’ has one of the expectedTypeClasses ‘[class org.openhab.core.library.types.DecimalType]’, matching command ‘49.0’ and dpt ‘17.001’
line_horizontal_3 20:13:30.536 TRACE org.openhab.binding.knx.internal.dpt.ValueDecoder Finally using datapoint DPT = 17.001
line_horizontal_3 20:13:30.536 TRACE org.openhab.binding.knx.internal.handler.DeviceThingHandler processDataReceived postCommand to channel ‘knx:device:e016ef5bd9:e4bb4d9970:SzenenKinderzimmerMitteAlleGeraete’ new value ‘[49]’ for GA ‘0/3/45’
info_circle 20:13:30.537 INFO openhab.event.ItemCommandEvent Item ‘Szenen_Szenen_Kinderzimmer_Mitte_alle_Gerate’ received command 49.0
info_circle 20:13:30.537 INFO org.openhab.automation.script.ui.06f69b1506 Skript KNX Erweiterung ausführen.
info_circle 20:13:30.538 INFO openhab.event.ItemStatePredictedEvent Item ‘Szenen_Szenen_Kinderzimmer_Mitte_alle_Gerate’ predicted to become 49.0
info_circle 20:13:30.538 INFO org.openhab.automation.script.ui.06f69b1506 49
info_circle 20:13:30.539 INFO openhab.event.ItemStateChangedEvent Item ‘Szenen_Szenen_Kinderzimmer_Mitte_alle_Gerate’ changed from 62.0 to 49.0
info_circle 20:13:30.539 INFO org.openhab.automation.script.ui.06f69b1506 Szenen_Szenen_Kinderzimmer_Mitte_alle_Gerate
info_circle 20:13:30.540 INFO org.openhab.automation.script.ui.a3b9dae9dc Triggering item name: Szenen_Szenen_Kinderzimmer_Mitte_alle_GerateEmpfangene Szene: 49
info_circle 20:13:30.541 INFO org.openhab.automation.script.ui.a3b9dae9dc Steckdosenlicht schalten.
line_horizontal_3 20:13:30.543 TRACE org.openhab.binding.knx.internal.handler.DeviceThingHandler Handling command ‘49.0’ for channel ‘knx:device:e016ef5bd9:e4bb4d9970:SzenenKinderzimmerMitteAlleGeraete’
line_horizontal_3 20:13:30.544 TRACE org.openhab.binding.knx.internal.channel.KNXChannel getCommandSpec checking keys ‘[ga]’ for command ‘49.0’ (class org.openhab.core.library.types.DecimalType)
line_horizontal_3 20:13:30.544 TRACE org.openhab.binding.knx.internal.channel.KNXChannel getCommandSpec key ‘ga’ has one of the expectedTypeClasses ‘[class org.openhab.core.library.types.DecimalType]’, matching command ‘49.0’ and dpt ‘17.001’
line_horizontal_3 20:13:30.544 TRACE org.openhab.binding.knx.internal.client.AbstractKNXClient writeToKNX groupAddress ‘0/3/45’, commandSpec ‘0/3/45:17.001 49.0’
line_horizontal_3 20:13:30.544 TRACE org.openhab.binding.knx.internal.client.AbstractKNXClient sendToKNX mappedValue: ‘49’ groupAddress: ‘0/3/45’
line_horizontal_3 20:13:30.562 TRACE org.openhab.binding.knx.internal.client.AbstractKNXClient Received a Group Write telegram from ‘1.0.3’ to ‘0/3/45’ with value ‘[61]’
ant 20:13:30.562 DEBUG org.openhab.binding.knx.internal.handler.DeviceThingHandler onGroupWrite Thing ‘knx:device:e016ef5bd9:e4bb4d9970’ received a GroupValueWrite telegram from ‘1.0.3’ for destination ‘0/3/45’
line_horizontal_3 20:13:30.562 TRACE org.openhab.binding.knx.internal.handler.DeviceThingHandler onGroupWrite Thing ‘knx:device:e016ef5bd9:e4bb4d9970’ processes a GroupValueWrite telegram for destination ‘0/3/45’ for channel ‘knx:device:e016ef5bd9:e4bb4d9970:SzenenKinderzimmerMitteAlleGeraete’
line_horizontal_3 20:13:30.562 TRACE org.openhab.binding.knx.internal.handler.DeviceThingHandler onGroupWrite isControl
line_horizontal_3 20:13:30.563 TRACE org.openhab.binding.knx.internal.dpt.ValueDecoder Finally using datapoint DPT = 17.001
line_horizontal_3 20:13:30.563 TRACE org.openhab.binding.knx.internal.channel.KNXChannel getCommandSpec checking keys ‘[ga]’ for command ‘61.0’ (class org.openhab.core.library.types.DecimalType)
line_horizontal_3 20:13:30.563 TRACE org.openhab.binding.knx.internal.channel.KNXChannel getCommandSpec key ‘ga’ has one of the expectedTypeClasses ‘[class org.openhab.core.library.types.DecimalType]’, matching command ‘61.0’ and dpt ‘17.001’
line_horizontal_3 20:13:30.563 TRACE org.openhab.binding.knx.internal.dpt.ValueDecoder Finally using datapoint DPT = 17.001
line_horizontal_3 20:13:30.564 TRACE org.openhab.binding.knx.internal.handler.DeviceThingHandler processDataReceived postCommand to channel ‘knx:device:e016ef5bd9:e4bb4d9970:SzenenKinderzimmerMitteAlleGeraete’ new value ‘[61]’ for GA ‘0/3/45’
info_circle 20:13:30.565 INFO openhab.event.ItemCommandEvent Item ‘Szenen_Szenen_Kinderzimmer_Mitte_alle_Gerate’ received command 61.0
info_circle 20:13:30.565 INFO org.openhab.automation.script.ui.06f69b1506 Skript KNX Erweiterung ausführen.
info_circle 20:13:30.565 INFO openhab.event.ItemStatePredictedEvent Item ‘Szenen_Szenen_Kinderzimmer_Mitte_alle_Gerate’ predicted to become 61.0
info_circle 20:13:30.566 INFO org.openhab.automation.script.ui.06f69b1506 61
info_circle 20:13:30.566 INFO openhab.event.ItemStateChangedEvent Item ‘Szenen_Szenen_Kinderzimmer_Mitte_alle_Gerate’ changed from 49.0 to 61.0
info_circle 20:13:30.566 INFO org.openhab.automation.script.ui.06f69b1506 Szenen_Szenen_Kinderzimmer_Mitte_alle_Gerate
info_circle 20:13:30.567 INFO org.openhab.automation.script.ui.a3b9dae9dc Triggering item name: Szenen_Szenen_Kinderzimmer_Mitte_alle_GerateEmpfangene Szene: 61
info_circle 20:13:30.568 INFO org.openhab.automation.script.ui.a3b9dae9dc Steckdosenlicht schalten.
flag 20:13:30.569 WARN org.openhab.core.automation.module.script.internal.defaultscope.ScriptBusEventImpl Command ‘ON’ cannot be parsed for item ‘KinderzimmerMitteBeleuchtungNacht (Type=GroupItem, Members=0, State=NULL, Label=Phyllis Beleuchtung Nacht, Category=light, Groups=[AtelierLicht])’.
ant 20:13:30.585 DEBUG org.openhab.binding.knx.internal.client.AbstractKNXClient Wrote value ‘49.0’ to datapoint ‘command DP 0/3/45 ‘knx:ip:e016ef5bd9’, DPT 17.001, low priority’ (0. attempt).
line_horizontal_3 20:13:30.589 TRACE org.openhab.binding.knx.internal.handler.DeviceThingHandler Handling command ‘61.0’ for channel ‘knx:device:e016ef5bd9:e4bb4d9970:SzenenKinderzimmerMitteAlleGeraete’
line_horizontal_3 20:13:30.590 TRACE org.openhab.binding.knx.internal.channel.KNXChannel getCommandSpec checking keys ‘[ga]’ for command ‘61.0’ (class org.openhab.core.library.types.DecimalType)
line_horizontal_3 20:13:30.590 TRACE org.openhab.binding.knx.internal.channel.KNXChannel getCommandSpec key ‘ga’ has one of the expectedTypeClasses ‘[class org.openhab.core.library.types.DecimalType]’, matching command ‘61.0’ and dpt ‘17.001’
line_horizontal_3 20:13:30.590 TRACE org.openhab.binding.knx.internal.client.AbstractKNXClient writeToKNX groupAddress ‘0/3/45’, commandSpec ‘0/3/45:17.001 61.0’
line_horizontal_3 20:13:30.590 TRACE org.openhab.binding.knx.internal.client.AbstractKNXClient sendToKNX mappedValue: ‘61’ groupAddress: ‘0/3/45’
ant 20:13:30.610 DEBUG org.openhab.binding.knx.internal.client.AbstractKNXClient Wrote value ‘61.0’ to datapoint ‘command DP 0/3/45 ‘knx:ip:e016ef5bd9’, DPT 17.001, low priority’ (0. attempt).
line_horizontal_3 20:13:30.630 TRACE org.openhab.binding.knx.internal.client.AbstractKNXClient Received a Group Write telegram from ‘1.0.3’ to ‘0/3/45’ with value ‘[61]’
ant 20:13:30.630 DEBUG org.openhab.binding.knx.internal.handler.DeviceThingHandler onGroupWrite Thing ‘knx:device:e016ef5bd9:e4bb4d9970’ received a GroupValueWrite telegram from ‘1.0.3’ for destination ‘0/3/45’
line_horizontal_3 20:13:30.631 TRACE org.openhab.binding.knx.internal.handler.DeviceThingHandler onGroupWrite Thing ‘knx:device:e016ef5bd9:e4bb4d9970’ processes a GroupValueWrite telegram for destination ‘0/3/45’ for channel ‘knx:device:e016ef5bd9:e4bb4d9970:SzenenKinderzimmerMitteAlleGeraete’
line_horizontal_3 20:13:30.631 TRACE org.openhab.binding.knx.internal.handler.DeviceThingHandler onGroupWrite isControl
line_horizontal_3 20:13:30.631 TRACE org.openhab.binding.knx.internal.dpt.ValueDecoder Finally using datapoint DPT = 17.001
line_horizontal_3 20:13:30.631 TRACE org.openhab.binding.knx.internal.channel.KNXChannel getCommandSpec checking keys ‘[ga]’ for command ‘61.0’ (class org.openhab.core.library.types.DecimalType)
line_horizontal_3 20:13:30.632 TRACE org.openhab.binding.knx.internal.channel.KNXChannel getCommandSpec key ‘ga’ has one of the expectedTypeClasses ‘[class org.openhab.core.library.types.DecimalType]’, matching command ‘61.0’ and dpt ‘17.001’
line_horizontal_3 20:13:30.632 TRACE org.openhab.binding.knx.internal.dpt.ValueDecoder Finally using datapoint DPT = 17.001
line_horizontal_3 20:13:30.632 TRACE org.openhab.binding.knx.internal.handler.DeviceThingHandler processDataReceived postCommand to channel ‘knx:device:e016ef5bd9:e4bb4d9970:SzenenKinderzimmerMitteAlleGeraete’ new value ‘[61]’ for GA ‘0/3/45’
info_circle 20:13:30.634 INFO openhab.event.ItemStatePredictedEvent Item ‘Szenen_Szenen_Kinderzimmer_Mitte_alle_Gerate’ predicted to become 61.0
info_circle 20:13:30.634 INFO org.openhab.automation.script.ui.06f69b1506 Skript KNX Erweiterung ausführen.
info_circle 20:13:30.638 INFO org.openhab.automation.script.ui.06f69b1506 61
info_circle 20:13:30.639 INFO org.openhab.automation.script.ui.06f69b1506 Szenen_Szenen_Kinderzimmer_Mitte_alle_Gerate
line_horizontal_3 20:13:30.639 TRACE org.openhab.binding.knx.internal.handler.DeviceThingHandler Handling command ‘61.0’ for channel ‘knx:device:e016ef5bd9:e4bb4d9970:SzenenKinderzimmerMitteAlleGeraete’
line_horizontal_3 20:13:30.640 TRACE org.openhab.binding.knx.internal.channel.KNXChannel getCommandSpec checking keys ‘[ga]’ for command ‘61.0’ (class org.openhab.core.library.types.DecimalType)
info_circle 20:13:30.640 INFO org.openhab.automation.script.ui.a3b9dae9dc Triggering item name: Szenen_Szenen_Kinderzimmer_Mitte_alle_GerateEmpfangene Szene: 61
line_horizontal_3 20:13:30.640 TRACE org.openhab.binding.knx.internal.channel.KNXChannel getCommandSpec key ‘ga’ has one of the expectedTypeClasses ‘[class org.openhab.core.library.types.DecimalType]’, matching command ‘61.0’ and dpt ‘17.001’
line_horizontal_3 20:13:30.640 TRACE org.openhab.binding.knx.internal.client.AbstractKNXClient writeToKNX groupAddress ‘0/3/45’, commandSpec ‘0/3/45:17.001 61.0’
line_horizontal_3 20:13:30.641 TRACE org.openhab.binding.knx.internal.client.AbstractKNXClient sendToKNX mappedValue: ‘61’ groupAddress: ‘0/3/45’
info_circle 20:13:30.641 INFO org.openhab.automation.script.ui.a3b9dae9dc Steckdosenlicht schalten.
flag 20:13:30.642 WARN org.openhab.core.automation.module.script.internal.defaultscope.ScriptBusEventImpl Command ‘ON’ cannot be parsed for item ‘KinderzimmerMitteBeleuchtungNacht (Type=GroupItem, Members=0, State=NULL, Label=Phyllis Beleuchtung Nacht, Category=light, Groups=[AtelierLicht])’.
ant 20:13:30.661 DEBUG org.openhab.binding.knx.internal.client.AbstractKNXClient Wrote value ‘61.0’ to datapoint ‘command DP 0/3/45 ‘knx:ip:e016ef5bd9’, DPT 17.001, low priority’ (0. attempt).

I think I can answer my own question. I read the docs in the way that virtual knx devices should use the -control type channel. Hence I created a virtual knx device with the scenes as channels and number-control. This made openhab send a change in the channel to the bus. Changing the type to number resolves the issue.