Fix

Signed-off-by: Chaoscaot <chaoscaot444@gmail.com>

SpigotCore_Main/src/de/steamwar/sql/CheckedSchematic.java

@@ -29,6 +29,7 @@ public class CheckedSchematic {
     private static final SQL.Statement checkHistory = new SQL.Statement("SELECT * FROM CheckedSchematic WHERE NodeId IN (SELECT NodeId FROM SchematicNode WHERE NodeOwner = ?) AND DeclineReason != '' AND DeclineReason != 'Prüfvorgang abgebrochen' AND NodeId is not NULL ORDER BY EndTime DESC");
     private static final SQL.Statement nodeHistory = new SQL.Statement("SELECT * FROM CheckedSchematic WHERE NodeId = ? AND DeclineReason != '' AND DeclineReason != 'Prüfvorgang abgebrochen' ORDER BY EndTime DESC");
     private static final SQL.Statement insert = new SQL.Statement("INSERT INTO CheckedSchematic (NodeId, NodeName, NodeOwner, Validator, StartTime, EndTime, DeclineReason) VALUES (?, ?, ?, ?, ?)");
+    private static final SQL.Statement setNodeNull = new SQL.Statement("UPDATE CheckedSchematic SET NodeId = NULL WHERE NodeId = ?");
 
     private final Integer node;
     private final int validator;
@@ -130,4 +131,8 @@ public class CheckedSchematic {
     public int getSchemOwner() {
         return SchematicNode.getSchematicNode(node).getId();
     }
+
+    public void remove() {
+        setNodeNull.update(node);
+    }
 }