The error message indicates that the

supported_destination_sync_modes

value in your connector specification is not valid. The valid enumeration members for

supported_destination_sync_modes

are 'append', 'overwrite', and 'append_dedup'. According to the [documentation](https://docs.airbyte.com/connector-development/tutorials/building-a-python-destination),

supported_destination_sync_modes

is an array of strings declaring the sync modes supported by this connector. The available options are: - `overwrite`: The connector can be configured to wipe any existing data in a stream before writing new data - `append`: The connector can be configured to append new data to existing data - `append_dedup`: The connector can be configured to deduplicate (i.e: UPSERT) data in the destination based on the new data and primary keys Please ensure that the

supported_destination_sync_modes

value in your connector specification matches one of these valid options.