diff --git a/airbyte_cdk/sources/streams/concurrent/cursor.py b/airbyte_cdk/sources/streams/concurrent/cursor.py
index b40709078..4f103b224 100644
--- a/airbyte_cdk/sources/streams/concurrent/cursor.py
+++ b/airbyte_cdk/sources/streams/concurrent/cursor.py
@@ -5,7 +5,18 @@
 import functools
 import logging
 from abc import ABC, abstractmethod
-from typing import Any, Callable, Iterable, List, Mapping, MutableMapping, Optional, Protocol, Tuple
+from typing import (
+    Any,
+    Callable,
+    Iterable,
+    List,
+    Mapping,
+    MutableMapping,
+    Optional,
+    Protocol,
+    Tuple,
+    Union,
+)
 
 from airbyte_cdk.sources.connector_state_manager import ConnectorStateManager
 from airbyte_cdk.sources.message import MessageRepository
@@ -175,7 +186,9 @@ def __init__(
         self.start, self._concurrent_state = self._get_concurrent_state(stream_state)
         self._lookback_window = lookback_window
         self._slice_range = slice_range
-        self._most_recent_cursor_value_per_partition: MutableMapping[StreamSlice, Any] = {}
+        self._most_recent_cursor_value_per_partition: MutableMapping[
+            Union[StreamSlice, Mapping[str, Any], None], Any
+        ] = {}
         self._has_closed_at_least_one_slice = False
         self._cursor_granularity = cursor_granularity
         # Flag to track if the logger has been triggered (per stream)
@@ -216,10 +229,13 @@ def observe(self, record: Record) -> None:
         most_recent_cursor_value = self._most_recent_cursor_value_per_partition.get(
             record.associated_slice
         )
-        cursor_value = self._extract_cursor_value(record)
+        try:
+            cursor_value = self._extract_cursor_value(record)
 
-        if most_recent_cursor_value is None or most_recent_cursor_value < cursor_value:
-            self._most_recent_cursor_value_per_partition[record.associated_slice] = cursor_value
+            if most_recent_cursor_value is None or most_recent_cursor_value < cursor_value:
+                self._most_recent_cursor_value_per_partition[record.associated_slice] = cursor_value
+        except ValueError:
+            self._log_for_record_without_cursor_value()
 
     def _extract_cursor_value(self, record: Record) -> Any:
         return self._connector_state_converter.parse_value(self._cursor_field.extract_value(record))
@@ -459,10 +475,13 @@ def should_be_synced(self, record: Record) -> bool:
         try:
             record_cursor_value: CursorValueType = self._extract_cursor_value(record)  # type: ignore  # cursor_field is converted to an InterpolatedString in __post_init__
         except ValueError:
-            if not self._should_be_synced_logger_triggered:
-                LOGGER.warning(
-                    f"Could not find cursor field `{self.cursor_field.cursor_field_key}` in record. The incremental sync will assume it needs to be synced"
-                )
-                self._should_be_synced_logger_triggered = True
+            self._log_for_record_without_cursor_value()
             return True
         return self.start <= record_cursor_value <= self._end_provider()
+
+    def _log_for_record_without_cursor_value(self) -> None:
+        if not self._should_be_synced_logger_triggered:
+            LOGGER.warning(
+                f"Could not find cursor field `{self.cursor_field.cursor_field_key}` in record for stream {self._stream_name}. The incremental sync will assume it needs to be synced"
+            )
+            self._should_be_synced_logger_triggered = True
diff --git a/unit_tests/sources/streams/concurrent/test_cursor.py b/unit_tests/sources/streams/concurrent/test_cursor.py
index ea9b29ca3..008b5f780 100644
--- a/unit_tests/sources/streams/concurrent/test_cursor.py
+++ b/unit_tests/sources/streams/concurrent/test_cursor.py
@@ -101,6 +101,20 @@ def _cursor_without_slice_boundary_fields(self) -> ConcurrentCursor:
             _NO_LOOKBACK_WINDOW,
         )
 
+    def test_given_no_cursor_value_when_observe_then_do_not_raise(self) -> None:
+        cursor = self._cursor_with_slice_boundary_fields()
+        partition = _partition(_NO_SLICE)
+
+        cursor.observe(
+            Record(
+                data={"record_with_A_CURSOR_FIELD_KEY": "any value"},
+                associated_slice=partition.to_slice(),
+                stream_name=_A_STREAM_NAME,
+            )
+        )
+
+        # did not raise
+
     def test_given_boundary_fields_when_close_partition_then_emit_state(self) -> None:
         cursor = self._cursor_with_slice_boundary_fields()
         cursor.close_partition(