diff --git a/src/braindrop/app/data/local.py b/src/braindrop/app/data/local.py
index 7555196..b56bac4 100644
--- a/src/braindrop/app/data/local.py
+++ b/src/braindrop/app/data/local.py
@@ -201,7 +201,9 @@ def collection(self, identity: int) -> Collection:
                 else self._collections[identity]
             )
         except KeyError:
-            raise self.UnknonwCollection(f"Unknown collection identity: {identity}")
+            raise self.UnknonwCollection(
+                f"Unknown collection identity: {identity}"
+            ) from None
 
     @property
     def collections(self) -> list[Collection]: