From 47e8da353273fbf1216ed825f2543809b2ab0552 Mon Sep 17 00:00:00 2001
From: muelleram <a.muller@cml.leidenuniv.nl>
Date: Wed, 18 Sep 2024 11:58:21 +0200
Subject: [PATCH] add check for user-provided unique_id in TimeMappingDict
 already exists

---
 bw_timex/helper_classes.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/bw_timex/helper_classes.py b/bw_timex/helper_classes.py
index 564b2f7..36cc8b6 100644
--- a/bw_timex/helper_classes.py
+++ b/bw_timex/helper_classes.py
@@ -129,6 +129,10 @@ def add(self, process_time_tuple, unique_id=None):
             return self[process_time_tuple]
 
         if unique_id is not None:
+            if unique_id in self.values():
+                raise ValueError(
+                    f"Unique ID {unique_id} is already assigned to another process_time_tuple."
+                )
             self[process_time_tuple] = unique_id
             return unique_id