Know which system controls what.

Treat an availability feed and a broader channel integration as different tools; verify the data carried by your exact connection.

Each important field needs an authoritative editing location and a known verification path.

Confirm supported account behavior and property mapping before changing a live sales channel.

Verify the exact listing, data responsibilities and payment arrangement rather than assuming every channel behaves alike.

Preserve a useful existing site unless replacing it solves a demonstrated problem.

Check clarity, property identity and failure recovery without making a real reservation or payment.

Reconcile records and responsibilities before retiring the old system; do not treat import success as complete migration.

Choose the supported source of each price and restriction; do not edit every dashboard until numbers happen to match.

A blocked date, a cancelled booking and a removed calendar event are not necessarily the same operation.