-$MYSQLCMD -e "DROP TABLE zipcodes; DROP TABLE IF EXISTS civicrm_install_canary; UPDATE civicrm_domain SET config_backend = NULL; DELETE FROM civicrm_extension; DELETE FROM civicrm_cache; DELETE FROM civicrm_setting;"
+$MYSQLCMD -e "DROP TABLE zipcodes; DROP TABLE IF EXISTS civicrm_install_canary; DELETE FROM civicrm_cache; DELETE FROM civicrm_setting;"
+$MYSQLCMD -e "DELETE FROM civicrm_extension WHERE full_name NOT IN ('sequentialcreditnotes');"