An error with Conversations

[birdfeedr]

db is MySQLi, maybe other variables apply, but this is my current SQL Mode setting

sql mode
ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION


Since I am not a database wizard, I am not sure of the pros/cons of ONLY_FULL_GROUP_BY directive.

I'd appreciate your scrutiny and suggestion for resolution.

Larry

Code:

Your copy of MyBB has experienced an error. Details of the error include:
---
Type: 20
File:  (Line no. 0)
Message
SQL Error: 1055 - Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'hlf_dbHLFv2.c.cid' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
Query:
SELECT * FROM (
              SELECT          c.cid,
                                c.uid,
                                GROUP_CONCAT(p.uid) AS puids,
                                c.subject
              FROM            mybb_cnv_conversations c
              LEFT OUTER JOIN mybb_cnv_participants p
              ON              p.cid = c.cid
              WHERE          c.subject = 'New Reply to 6 years ago'
                              AND
                              c.uid IS NULL
              GROUP BY p.cid
              ) innerqry
WHERE puids = '98'
ORDER BY cid DESC
LIMIT 1
Back Trace: #0  errorHandler->email_error(20, SQL Error: 1055 - Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'hlf_dbHLFv2.c.cid' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
Query:
SELECT * FROM (
              SELECT          c.cid,
                                c.uid,
                                GROUP_CONCAT(p.uid) AS puids,
                                c.subject
              FROM            mybb_cnv_conversations c
              LEFT OUTER JOIN mybb_cnv_participants p
              ON              p.cid = c.cid
              WHERE          c.subject = 'New Reply to 6 years ago'
                              AND
                              c.uid IS NULL
              GROUP BY p.cid
              ) innerqry
WHERE puids = '98'
ORDER BY cid DESC
LIMIT 1, , 0) called at [/home/hlf/public_html/forum/inc/class_error.php:195]
#1  errorHandler->error(20, Array ([error_no] => 1055,[error] => Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'hlf_dbHLFv2.c.cid' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by,[query] =>
SELECT * FROM (
              SELECT          c.cid,
                                c.uid,
                                GROUP_CONCAT(p.uid) AS puids,
                                c.subject
              FROM            mybb_cnv_conversations c
              LEFT OUTER JOIN mybb_cnv_participants p
              ON              p.cid = c.cid
              WHERE          c.subject = 'New Reply to 6 years ago'
                              AND
                              c.uid IS NULL
              GROUP BY p.cid
              ) innerqry
WHERE puids = '98'
ORDER BY cid DESC
LIMIT 1)) called at [/home/hlf/public_html/forum/inc/db_mysqli.php:597]
#2  DB_MySQLi->error(
SELECT * FROM (
              SELECT          c.cid,
                                c.uid,
                                GROUP_CONCAT(p.uid) AS puids,
                                c.subject
              FROM            mybb_cnv_conversations c
              LEFT OUTER JOIN mybb_cnv_participants p
              ON              p.cid = c.cid
              WHERE          c.subject = 'New Reply to 6 years ago'
                              AND
                              c.uid IS NULL
              GROUP BY p.cid
              ) innerqry
WHERE puids = '98'
ORDER BY cid DESC
LIMIT 1) called at [/home/hlf/public_html/forum/inc/db_mysqli.php:337]
#3  DB_MySQLi->query(
SELECT * FROM (
              SELECT          c.cid,
                                c.uid,
                                GROUP_CONCAT(p.uid) AS puids,
                                c.subject
              FROM            mybb_cnv_conversations c
              LEFT OUTER JOIN mybb_cnv_participants p
              ON              p.cid = c.cid
              WHERE          c.subject = 'New Reply to 6 years ago'
                              AND
                              c.uid IS NULL
              GROUP BY p.cid
              ) innerqry
WHERE puids = '98'
ORDER BY cid DESC
LIMIT 1) called at [/home/hlf/public_html/forum/inc/plugins/converse/converse-pm-datahandler-override.php:149]
#4  PMDataHandler->insert_pm() called at [/home/hlf/public_html/forum/inc/functions.php:8816]
#5  send_pm(Array ([subject] => New Reply to 6 years ago,[message] => dingo,

WiMStang has just replied to a thread which you have subscribed to. This thread is titled 6 years ago.