Index: setup.php
===================================================================
--- setup.php	(revision 327)
+++ setup.php	(working copy)
@@ -80,6 +80,8 @@
    $PLUGIN_HOOKS['item_action_targets']['behaviors'] =
       ['NotificationTargetTicket' => ['PluginBehaviorsTicket',      'addActionTargets']];
 
+   $PLUGIN_HOOKS['pre_item_form']['behaviors'] = [PluginBehaviorsITILSolution::class, 'messageWarningSolution'];
+   $PLUGIN_HOOKS['post_item_form']['behaviors'] = [PluginBehaviorsITILSolution::class, 'deleteAddSolutionButtton'];
    // End init, when all types are registered
    $PLUGIN_HOOKS['post_init']['behaviors'] = ['PluginBehaviorsCommon', 'postInit'];