If you drop the replication slot, Airbyte will not be able to continue using CDC to write data into the destination. The replication slot is required for Airbyte to read the transaction log (write-ahead log) and transmit the logged changes to the destination system. You need to create and configure a replication slot for Airbyte to use CDC with PostgreSQL. Here's how to create a replication slot:

sql SELECT pg_create_logical_replication_slot('airbyte_tut_slot', 'pgoutput');

If you drop the replication slot, you'll need to recreate it and reconfigure Airbyte to use the new slot for CDC to work correctly. Keep in mind that using CDC increases disk space usage on the database server, so it's essential to set frequent syncs and manage replication slots properly. Source: [Airbyte Tutorials - Incremental Change Data Capture (CDC) Replication](https://airbyte.com/tutorials/incremental-change-data-capture-cdc-replication)