Do not update todos on recompiling old protocols

tasks.py

@@ -301,6 +301,12 @@ def parse_protocol_async_inner(protocol, encoded_kwargs):
                     db.session.add(todo)
                     db.session.commit()
         todo.protocols.append(protocol)
+        is_newest_protocol = True
+        for other_protocol in todo.protocols:
+            if other_protocol.date > protocol.date:
+                is_newest_protocol = False
+                break
+        if is_newest_protocol:
             todo.state = field_state
             todo.date = field_date
             todo.who = who