Try to hack detected when trying to save ticket with attachment

I am on version: V10.3.4

Is there a good reliable guide for UPDATING VERSION. 

​​​​​​​I cannot afford lose my data and ticket system if I upgrade versions.

Understood. And best practice would be to utilize the latest stable release.

This was one of the latest logged events:

2025-09-23 10:37:30.449 ***** ERROR ***** [V10.3.4] HACK ================================================================
2025-09-23 10:37:30.450 ***** ERROR ***** [V10.3.4] Try to hack detected
2025-09-23 10:37:30.451 ***** ERROR ***** [V10.3.4] Source Code = SqlElement->_construct : id '.' is not numeric for class DocumentVersion
2025-09-23 10:37:30.452 ***** ERROR ***** [V10.3.4] QUERY_STRING = csrfToken=&destinationWidth=50&destinationHeight=0&isIE=&xhrPostDestination=resultDivMain&xhrPostIsResultMessage=true&xhrPostValidationType=&xhrPostTimestamp=1758638247403&csrfToken=
2025-09-23 10:37:30.454 ***** ERROR ***** [V10.3.4] REMOTE_ADDR = 10.203.1.98
2025-09-23 10:37:30.455 ***** ERROR ***** [V10.3.4] SCRIPT_FILENAME = C:/Program Files (x86)/EasyPHP-Devserver-17/eds-www/projeqtor/tool/saveObject.php
2025-09-23 10:37:30.456 ***** ERROR ***** [V10.3.4] CONNECTED USER = #3 - NPIETROSANTI
2025-09-23 10:37:30.456 ***** ERROR ***** [V10.3.4] === Trace Stack for last error ===
2025-09-23 10:37:30.457 ***** ERROR ***** [V10.3.4] => C:\Program Files (x86)\EasyPHP-Devserver-17\eds-www\projeqtor\tool\projeqtor.php at line 1691 calling debugPrintTraceStack()
2025-09-23 10:37:30.458 ***** ERROR ***** [V10.3.4] => C:\Program Files (x86)\EasyPHP-Devserver-17\eds-www\projeqtor\model\persistence\SqlElement.php at line 779 calling traceHack()
2025-09-23 10:37:30.459 ***** ERROR ***** [V10.3.4] => C:\Program Files (x86)\EasyPHP-Devserver-17\eds-www\projeqtor\model\DocumentVersionMain.php at line 88 calling SqlElement:__construct()
2025-09-23 10:37:30.460 ***** ERROR ***** [V10.3.4] => C:\Program Files (x86)\EasyPHP-Devserver-17\eds-www\projeqtor\model\DocumentVersion.php at line 39 calling DocumentVersionMain:__construct()
2025-09-23 10:37:30.461 ***** ERROR ***** [V10.3.4] => C:\Program Files (x86)\EasyPHP-Devserver-17\eds-www\projeqtor\model\persistence\SqlElement.php at line 6073 calling DocumentVersion:__construct()
2025-09-23 10:37:30.462 ***** ERROR ***** [V10.3.4] => C:\Program Files (x86)\EasyPHP-Devserver-17\eds-www\projeqtor\model\persistence\SqlElement.php at line 1342 calling SqlElement:sendMailIfMailable()
2025-09-23 10:37:30.463 ***** ERROR ***** [V10.3.4] => C:\Program Files (x86)\EasyPHP-Devserver-17\eds-www\projeqtor\model\persistence\SqlElement.php at line 853 calling SqlElement:saveSqlElement()
2025-09-23 10:37:30.463 ***** ERROR ***** [V10.3.4] => C:\Program Files (x86)\EasyPHP-Devserver-17\eds-www\projeqtor\model\TicketMain.php at line 504 calling SqlElement:save()
2025-09-23 10:37:30.464 ***** ERROR ***** [V10.3.4] => C:\Program Files (x86)\EasyPHP-Devserver-17\eds-www\projeqtor\tool\saveObject.php at line 124 calling TicketMain:save()
2025-09-23 10:37:30.465 ***** ERROR ***** [V10.3.4] ===
2025-09-23 10:37:30.466 ***** ERROR ***** [V10.3.4] REQUEST_URI = /projeqtor/tool/saveObject.php?csrfToken=&destinationWidth=50&destinationHeight=0&isIE=&xhrPostDestination=resultDivMain&xhrPostIsResultMessage=true&xhrPostValidationType=&xhrPostTimestamp=1758638247403&csrfToken=

Is there a guide for updating ?