[Bug] Duplicate Split which cause duplicate data when open scanNewlyAddedTableEnabled

[EMsnap]

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• I searched in the issues and found nothing similar.

Flink version

FLINK 1.13 - FLINK 1.16 (all version)

Flink CDC version

Latest

Database and its version

Mysql (all version)

Minimal reproduce step

1、open scan.newly-added-table.enabled in mysql source
2、running in snapshot phase
3、stop and restart the job

The chunks that generated before stop will be generated again in the second start
So the data will be duplicated, this is unacceptable when table contains large chunk of data which will cause a lot of extra tim e

What did you expect to see?

no duplicate split when job restarts

What did you see instead?

duplicate split when job restarts

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!