When you execute cdc cli changefeed create to create a replication task, TiCDC checks whether the upstream tables meet the replication requirements. If some tables do not meet the requirements, some tables are not eligible to replicate is returned with a list of ineligible tables. You can choose Y or y to continue creating the task, and all updates on these tables are automatically ignored during the replication. If you choose an input other than Y or y, the replication task is not created.