Fix bidict.ValueDuplicationError

Author: addie9800

src/fundus/utils/events.py

@@ -2,7 +2,7 @@
 from collections import defaultdict
 from typing import Dict, List, Optional, Union
 
-from bidict import bidict
+from bidict import ON_DUP_DROP_OLD, bidict
 
 from fundus.logging import create_logger
 
@@ -142,7 +142,7 @@ def _alias(self, alias: str, key: Optional[int] = None):
             key: The thread identifier to associate with this alias.
                 If None, the current thread's identifier is used.
         """
-        self._aliases[alias] = key if key else self._get_identifier()
+        self._aliases.put(alias, key if key else self._get_identifier(), ON_DUP_DROP_OLD)
         if (ident := self._resolve(alias)) not in self._events:
             # noinspection PyStatementEffect
             # Since defaultdict doesn't provide a direct way to create defaults,