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With successful update from 4.7.25 to 4.7.29 there is a Performance warning: Missing Indices in CiviCRM System Status. When I click the Update Indices button, the error appears

Operation failed: Update Indices DB Error: unknown error

Enabling debug mode does not provide any additional info.

Operation failed: Update Indices

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  • Just wondering why you are only upgrading to 4.7.29 ? There are lots of fixes since then in later versions. – Aidan♦ Jun 27 '18 at 8:31
  • @Aidan, I was trying to do step by step upgrade, because upgrading to 4.7.30 (or later) got me into these problems: civicrm.stackexchange.com/questions/25098/… – Aivars Jun 28 '18 at 15:44
  • Ok, that makes sense if 4.7.29 is an intermediate step. However, you can leave the Update Indices thing - that changed several times in releases around that time. It was a warning that indices were less than optimal but is not an error. When you eventually get to current versions you can fix it then if the warning still shows. – Aidan♦ Jun 28 '18 at 16:28
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We had similar problem this before and had to manually run mysql commands to fix the indices. This link might be useful to solve the problem.

HTH

Pradeep

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