# pt-table-checksum reports problem, but pt-table-sync will not fix it

**URL:** <https://forums.percona.com/t/pt-table-checksum-reports-problem-but-pt-table-sync-will-not-fix-it/5356>\
**Category:** Percona Toolkit\
**Created:** [January 18, 2017, 6:36pm UTC](https://forums.percona.com/t/pt-table-checksum-reports-problem-but-pt-table-sync-will-not-fix-it/5356 "2017-01-18T18:36:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Greg\_Kulosa](https://avatars.discourse-cdn.com/v4/letter/g/ce73a5/32.png) [@Greg\_Kulosa](https://forums.percona.com/u/Greg_Kulosa)\
**Post date:** [January 18, 2017, 6:36pm UTC](https://forums.percona.com/t/pt-table-checksum-reports-problem-but-pt-table-sync-will-not-fix-it/5356/1 "2017-01-18T18:36:07Z")

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We are planning a migration from MySQL 5.1.73 to the latest Percona 5.6 (5.6.29 is the latest we are testing with).

Our production DB is running 5.1, and we are testing a new slave running 5.6.

Our nightly pt-table-checksum is reporting checksum errors for one table, but when I run pt-table-sync, it does not spit out any “REPLACE INTO” statements to fix the problem.

Are there known issues with the Percona Tools and 5.1/5.6 master/slave combinations?

Thans.

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**Author:** ![mirfan](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/mirfan/32/16890_2.png) [@mirfan](https://forums.percona.com/u/mirfan)\
**Post date:** [March 30, 2017, 1:48am UTC](https://forums.percona.com/t/pt-table-checksum-reports-problem-but-pt-table-sync-will-not-fix-it/5356/2 "2017-03-30T01:48:25Z")

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Can you please post output of pt-table-checksum tool to check further.