OCPP Version Compatibility

[Gayatri-Alluri]

I am using
implementation("eu.chargetime.ocpp:common:1.0.2")
implementation("eu.chargetime.ocpp:v1_6:1.1.0")
dependencies for OCPP 1.6 - CSMS implementation. Now, I would like to start to support for OCPP 2.0.1 as well.
what are the compatible versions, so 1.6 and 2.0.1 both will work?

I tried upgrading ocpp:common:1.0.2 to ocpp-common:2.0 then Confirmation messages are missing and 1.6 is not working.
Do I need to use both libraries for common and ocpp 1.6 and ocpp 2.0.1?

implementation("eu.chargetime.ocpp:common:1.0.2")
implementation("eu.chargetime.ocpp:v1_6:1.1.0")
implementation("eu.chargetime.ocpp:ocpp-common:2.0")
implementation("eu.chargetime.ocpp:ocpp2:2.0")

what are the correct compatible versions, so existing support for 1.6 will not break and I can proceed with ocpp 2.0.1