Issue: Array to string conversion

ErrorException: Array to string conversion - library/XenForo/DataWriter.php:771 
Generated By: alfa, A moment ago

Stack Trace
#0 /library/XenForo/DataWriter.php(771): XenForo_Application::handlePhpError(8, 'Array to string...', '/home/...', 771, Array)
#1 /library/XenForo/DataWriter.php(721): XenForo_DataWriter->_castValueToType('string', Array, 'vw_extra', Array)
#2 /library/XenForo/DataWriter.php(643): XenForo_DataWriter->_isFieldValueValid('vw_extra', Array, Array, Array)
#3 /library/XenForo/DataWriter.php(1009): XenForo_DataWriter->set('vw_extra', Array, '', Array)
#4 /library/vw/XenForo/DataWriter/BbCode.php(28): XenForo_DataWriter->bulkSet(Array, NULL)
#5 /library/XenForo/ControllerAdmin/BbCode.php(130): vw_XenForo_DataWriter_BbCode->bulkSet(Array)
#6 /library/vw/XenForo/ControllerAdmin/BbCode.php(93): XenForo_ControllerAdmin_BbCode->actionSave()
#7 /library/XenForo/FrontController.php(351): vw_XenForo_ControllerAdmin_BbCode->actionSave()
#8 /library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#9 /admin.php(13): XenForo_FrontController->run()
#10 {main}
Request State
array(3) {
  ["url"] => string(61) "https://site.eu/admin.php?bb-codes/save"
  ["_GET"] => array(1) {
    ["bb-codes/save"] => string(0) ""
  }
  ["_POST"] => array(24) {
    ["new_bb_code_id"] => string(3) "sup"
    ["title"] => string(3) "SUP"
    ["description"] => string(11) "Superscript"
    ["bb_code_mode"] => string(7) "replace"
    ["has_option"] => string(2) "no"
    ["replace_html"] => string(46) "<sup style="vertical-align:top">{option}</sup>"
    ["callback_class"] => string(0) ""
    ["callback_method"] => string(0) ""
    ["example"] => string(21) "[sup]Header Tag[/sup]"
    ["allow_signature"] => string(1) "1"
    ["addon_id"] => string(3) "BBM"
    ["active"] => string(1) "1"
    ["option_regex"] => string(0) ""
    ["trim_lines_after"] => string(1) "0"
    ["editor_icon_url"] => string(0) ""
    ["sprite_params"] => array(2) {
      ["x"] => string(1) "0"
      ["y"] => string(1) "0"
    }
    ["replace_html_email"] => string(0) ""
    ["replace_text"] => string(0) ""
    ["vw_varname"] => string(0) ""
    ["vw_options"] => array(5) {
      ["nonwiki_editor"] => string(1) "1"
      ["wiki_editor"] => string(1) "1"
      ["nonwiki_faq"] => string(1) "1"
      ["nonwiki_parse"] => string(1) "1"
      ["wiki_parse"] => string(1) "1"
    }
    ["_xfToken"] => string(8) "********"
    ["_xfRequestUri"] => string(32) "/test1-xf/admin.php?bb-codes/add"
    ["_xfNoRedirect"] => string(1) "1"
    ["_xfResponseType"] => string(4) "json"
  }
}