diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 322b4ed23..f08b689d0 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -582,15 +582,11 @@ class Coder:
 
     def get_ident_filename_matches(self, idents):
         all_fnames = defaultdict(set)
-        existing_basenames = {
-            Path(fname).name.lower()
-            for fname in self.get_inchat_relative_files()
-            + [self.get_rel_fname(f) for f in self.abs_read_only_fnames]
-        }
 
         for fname in self.get_all_relative_files():
             base = Path(fname).with_suffix("").name.lower()
-            # Only skip if we already have a file with this name AND the base name matches the identifier
+            # Only skip if we already have a file with this name AND
+            # the base name matches the identifier
             if len(base) >= 5:
                 all_fnames[base].add(fname)