diff --git a/airbyte-integrations/connectors/source-zendesk-sunshine/integration_tests/abnormal_state.json b/airbyte-integrations/connectors/source-zendesk-sunshine/integration_tests/abnormal_state.json
new file mode 100644
index 000000000000..52b0f2c2118f
--- /dev/null
+++ b/airbyte-integrations/connectors/source-zendesk-sunshine/integration_tests/abnormal_state.json
@@ -0,0 +1,5 @@
+{
+  "todo-stream-name": {
+    "todo-field-name": "todo-abnormal-value"
+  }
+}
diff --git a/airbyte-integrations/connectors/source-zendesk-support/integration_tests/abnormal_state.json b/airbyte-integrations/connectors/source-zendesk-support/integration_tests/abnormal_state.json
deleted file mode 100644
index 5917f69152f7..000000000000
--- a/airbyte-integrations/connectors/source-zendesk-support/integration_tests/abnormal_state.json
+++ /dev/null
@@ -1,198 +0,0 @@
-[
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:37Z" },
-      "stream_descriptor": { "name": "users" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-15T22:19:01Z" },
-      "stream_descriptor": { "name": "groups" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-15T19:29:14Z" },
-      "stream_descriptor": { "name": "organizations" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-20T10:05:18Z" },
-      "stream_descriptor": { "name": "satisfaction_ratings" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "generated_timestamp": 7969616486 },
-      "stream_descriptor": { "name": "tickets" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-04-23T15:34:20Z" },
-      "stream_descriptor": { "name": "group_memberships" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-12-11T19:34:05Z" },
-      "stream_descriptor": { "name": "ticket_fields" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-12-11T20:34:37Z" },
-      "stream_descriptor": { "name": "ticket_forms" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "_ab_updated_at": 7969616486 },
-      "stream_descriptor": { "name": "ticket_metrics" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "time": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "ticket_metric_events" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-12-11T19:34:06Z" },
-      "stream_descriptor": { "name": "macros" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "created_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "ticket_comments" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "created_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "ticket_audits" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "created_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "audit_logs" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-12-11T19:34:06Z" },
-      "stream_descriptor": { "name": "posts" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-12-11T19:34:06Z" },
-      "stream_descriptor": { "name": "topics" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "organization_memberships" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "ticket_skips" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "custom_roles" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "schedules" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "sla_policies" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "post_votes" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "post_comments" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "post_comment_votes" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "articles" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "article_votes" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "article_comments" }
-    }
-  },
-  {
-    "type": "STREAM",
-    "stream": {
-      "stream_state": { "updated_at": "2222-07-19T22:21:26Z" },
-      "stream_descriptor": { "name": "article_comment_votes" }
-    }
-  }
-]
diff --git a/airbyte-integrations/connectors/source-zendesk-support/source_zendesk_support/manifest.yaml b/airbyte-integrations/connectors/source-zendesk-support/source_zendesk_support/manifest.yaml
index c60444637bcb..3ccd21ca7799 100644
--- a/airbyte-integrations/connectors/source-zendesk-support/source_zendesk_support/manifest.yaml
+++ b/airbyte-integrations/connectors/source-zendesk-support/source_zendesk_support/manifest.yaml
@@ -87,7 +87,7 @@ definitions:
       datetime_format: "%Y-%m-%dT%H:%M:%SZ"
       cursor_field: "{{ parameters.get('cursor_field',  'updated_at') }}"
       start_datetime:
-        datetime: "{{ config.get('start_date') }}"
+        datetime: "{{ config.get('start_date') or day_delta(-730, '%Y-%m-%dT%H:%M:%SZ') }}"
 
   cursor_incremental_sync:
     type: DatetimeBasedCursor
@@ -98,7 +98,7 @@ definitions:
     datetime_format: "%s"
     cursor_field: "{{ parameters.get('cursor_field',  'updated_at') }}"
     start_datetime:
-      datetime: "{{ timestamp(config.get('start_date')) | int or day_delta(-730, '%Y-%m-%dT%H:%M:%SZ') }}"
+      datetime: "{{ timestamp(config.get('start_date')) | int if config.get('start_date') else day_delta(-730, '%s') }}"
     start_time_option:
       inject_into: request_parameter
       field_name: "{{ parameters['cursor_filter'] }}"
diff --git a/airbyte-integrations/connectors/source-zendesk-support/source_zendesk_support/source.py b/airbyte-integrations/connectors/source-zendesk-support/source_zendesk_support/source.py
index 3c551a039c4e..5ca18a285112 100644
--- a/airbyte-integrations/connectors/source-zendesk-support/source_zendesk_support/source.py
+++ b/airbyte-integrations/connectors/source-zendesk-support/source_zendesk_support/source.py
@@ -44,11 +44,7 @@ def __init__(self, email: str, password: str):
 
 class SourceZendeskSupport(YamlDeclarativeSource):
     def __init__(self, catalog: Optional[ConfiguredAirbyteCatalog], config: Optional[Mapping[str, Any]], state: TState, **kwargs):
-        # Before 2024-11-11, the config was being modified in `streams`. We can't do that anymore because `ConcurrentDeclarativeSource` use
-        # the config to make concurrent components. Hence, the "main" config needs to be the declarative one and if Python sources need
-        # something a bit different, it needs to deduce it from the declarative config
-        declarative_config = SourceZendeskSupport.convert_config_to_declarative_stream_args(config) if config else None
-        super().__init__(catalog=catalog, config=declarative_config, state=state, **{"path_to_yaml": "manifest.yaml"})
+        super().__init__(catalog=catalog, config=config, state=state, **{"path_to_yaml": "manifest.yaml"})
 
     @classmethod
     def get_default_start_date(cls) -> str:
@@ -112,18 +108,6 @@ def convert_config2stream_args(cls, config: Mapping[str, Any]) -> Mapping[str, A
             "ignore_pagination": config.get("ignore_pagination", False),
         }
 
-    @classmethod
-    def convert_config_to_declarative_stream_args(cls, config: Mapping[str, Any]) -> Mapping[str, Any]:
-        """
-        Sets defaults to `start_date` and `ignore_pagination`.
-        """
-        return {
-            "subdomain": config["subdomain"],
-            "start_date": config.get("start_date", cls.get_default_start_date()),
-            "credentials": config.get("credentials"),
-            "ignore_pagination": config.get("ignore_pagination", False),
-        }
-
     def get_nested_streams(self, config: Mapping[str, Any]) -> List[Stream]:
         """Returns relevant a list of available streams
         :param config: A Mapping of the user input configuration as defined in the connector spec.