Information on "Track email delivery" page cannot be updated in Plesk

Symptoms

• Info is not updated. The following error is displayed:
  

  PLESK_ERROR: SQLSTATE[HY000]: General error: 1 too many SQL variables

• Old SQLite version (e.g. 3.7.17) is installed

Cause

SQLITE_MAX_VARIABLE_NUMBER is too low for older SQLite versions. This is considered a bug with ID EXTPLESK-6254

Resolution

Download a custom fix and update the file /usr/local/psa/admin/plib/modules/log-browser/library/Database/MailEvents/Table.phpattached to this article.