diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 8f13baff9..287bd9685 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -146,12 +146,11 @@ class Coder:
             if edit_format != from_coder.edit_format and done_messages and summarize_from_coder:
                 try:
                     done_messages = from_coder.summarizer.summarize_all(done_messages)
-                except ValueError as e:
+                except ValueError:
                     # If summarization fails, keep the original messages and warn the user
                     io.tool_warning(
                         "Chat history summarization failed, continuing with full history"
                     )
-                    io.tool_warning(str(e))
 
             # Bring along context from the old Coder
             update = dict(