diff --git a/src/logwatcher/classifier.py b/src/logwatcher/classifier.py
index 2be060d..315f9bd 100644
--- a/src/logwatcher/classifier.py
+++ b/src/logwatcher/classifier.py
@@ -66,7 +66,7 @@ def _is_duplicate_error(previous: LogEntry, current: LogEntry) -> bool:
         and previous.mdc_server_name == current.mdc_server_name
         and previous.store_name == current.store_name
         and previous.start_time == current.start_time
-        and _error_identity(previous) == _error_identity(current)
+        and previous.error_message == current.error_message
     )
 
 
diff --git a/tests/test_classifier.py b/tests/test_classifier.py
index 8bf6852..b96e00e 100644
--- a/tests/test_classifier.py
+++ b/tests/test_classifier.py
@@ -158,7 +158,7 @@ def test_classify_log_entries_merges_consecutive_duplicates():
 
 
 def test_classify_log_entries_merges_same_error_name():
-    """Same error code with a different amount is still a single log entry."""
+    """Same error code with a different amount is two different entries."""
     log_entries = parse_lines(
         [
             _build_log_line(
@@ -172,7 +172,7 @@ def test_classify_log_entries_merges_same_error_name():
 
     relevant, _ = classify_log_entries(log_entries)
 
-    assert len(relevant) == 1
+    assert len(relevant) == 2
 
 
 def test_classify_log_entries_keeps_duplicates_from_other_store_or_scan():