When you disable cart versioning, only one product configuration is created on the Quote Details page. Disabling Cart versioning disables the creation of Superseded configuration, if you reconfigure a cart after finalizing it, the existing product configuration is updated. If cart versioning is disabled, then on abandoning the cart the configuration is deleted and all changes done so far on the cart are lost. The prompt message on the click of Abandon informs you about the same if Cart Versioning is disabled.
Conga recommends you to enable Disable Cart Versioning if you do not need to maintain multiple configuration records and it also improves the cart launch time for the saved cart.
To disable cart versioning, select the Disable Cart Versioning checkbox on the Quote Details page.
It is not recommended to change the setting on an inflight quote.