Amqp node is not getting installed properly


I am trying to install amqp node for nodered.
I am using this command in my windows command prompt: npm install -g node-red-contrib-amqp
I am getting this error:
npm WARN notsup Unsupported engine for amqplib@0.4.2: wanted: {"node":">=0.8 <6 || ^6"} (current: {"node":"12.18.1","npm":"6.14.5"})
npm WARN notsup Not compatible with your version of node/npm: amqplib@0.4.2

Can anyone please suggest what to do?

Thanks in advance

You can't go back to nodejs 6, 8.x is currently the oldest currently supported by node red. I see there is already an issue for this on the github page, but the project does not seem to be getting much love at the moment.