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How to sovle " database query failed " ?

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asked Jan 3 in Q2A Core by suisguru

A Question2Answer database query failed when generating this page.  
A full description of the failure is available in the web server's error log file





below error_log : 

[03-Jan-2018 11:36:19 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/proshnco/public_html/qa-lang/bn/qa-lang-main.php:1) in /home/proshnco/public_html/qa-include/qa-page.php on line 770
[03-Jan-2018 11:36:19 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/proshnco/public_html/qa-lang/bn/qa-lang-main.php:1) in /home/proshnco/public_html/qa-include/qa-page.php on line 220
[03-Jan-2018 11:36:19 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/proshnco/public_html/qa-lang/bn/qa-lang-main.php:1) in /home/proshnco/public_html/qa-include/qa-page.php on line 377
[03-Jan-2018 11:36:19 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/proshnco/public_html/qa-lang/bn/qa-lang-main.php:1) in /home/proshnco/public_html/qa-include/qa-page.php on line 770
[03-Jan-2018 11:36:19 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/proshnco/public_html/qa-lang/bn/qa-lang-main.php:1) in /home/proshnco/public_html/qa-include/qa-page.php on line 220
[03-Jan-2018 11:36:19 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at /home/proshnco/public_html/qa-lang/bn/qa-lang-main.php:1) in /home/proshnco/public_html/qa-include/qa-page.php on line 377
[03-Jan-2018 11:36:28 UTC] PHP Notice:  Undefined variable: user_level in /home/proshnco/public_html/qa-include/qa-base.php(595) : eval()'d code on line 25
[03-Jan-2018 11:36:29 UTC] PHP Notice:  Undefined variable: user_level in /home/proshnco/public_html/qa-include/qa-base.php(595) : eval()'d code on line 25
[03-Jan-2018 11:38:03 UTC] PHP Question2Answer MySQL query error 1366: Incorrect string value: '\xE0\xA6...\x09...' for column 'params' at row 1 - Query: INSERT INTO qtoacp_eventlog (datetime, ipaddress, userid, handle, cookieid, event, params) VALUES (NOW(), '157.119.48.230', '1057', 'anik302', NULL, 'q_post', 'postid=1981 parentid= parent= title=আমাশয় হলে কি ও�... content= format= text= tags=আমাশয়,ওষুধ categoryid=8 extra= name= notify=1 email=')

Q2A version: 7.5

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