TiCDC meet duplicate entry error when run ycsb insert workload

[lidezhu]

What did you do?

1. set tidb config new_collations_enabled_on_first_bootstrap to false;
2. create changefeed;
3. run bin/ycsb load mysql ...

What did you expect to see?

TiCDC can sync data correctly.

What did you see instead?

TiCDC report error like duplicate entry ''

Versions of the cluster

Upstream TiDB cluster version (execute SELECT tidb_version(); in a MySQL client):

(paste TiDB cluster version here)

Upstream TiKV version (execute tikv-server --version):

(paste TiKV version here)

TiCDC version (execute cdc version):

(paste TiCDC version here)

nightly