when upgrading the version from dify 1.10.1-fix.1 to 1.15.0,the originally normal chatflow doesn't work error: Workflow Agent node 1756347762231 requires a binding before publishing.

[yanpx169]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

I have configured the following parameter in the.env file:

AGENT_BACKEND_USE_FAKE=true
AGENT_BACKEND_FAKE_SCENARIO=success

When I published the new feature added to the existing function, an error occurred:
Workflow Agent node 1756347762231 requires a binding before publishing.

nginx-1             | 10.92.52.218 - - [03/Jul/2026:02:03:30 +0000] "POST /console/api/apps/214005a9-8312-4d83-a4d3-f75f63b2f955/workflows/draft HTTP/1.1" 200 119 "http://10.xxx.xx.37/app/214005a9-8312-4d83-a4d3-f75f63b2f955/workflow" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36" "-"
api-1               | 2026-07-03 02:03:31.712 ERROR [Dummy-508] [external_api.py:92] 3389ebdc4cbb546499e7bad2b3096f58 - value_error in request handler
api-1               | Traceback (most recent call last):
api-1               |   File "/app/api/.venv/lib/python3.12/site-packages/flask/app.py", line 917, in full_dispatch_request
api-1               |     rv = self.dispatch_request()
api-1               |          ^^^^^^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/.venv/lib/python3.12/site-packages/flask/app.py", line 902, in dispatch_request
api-1               |     return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)  # type: ignore[no-any-return]
api-1               |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/.venv/lib/python3.12/site-packages/flask_restx/api.py", line 404, in wrapper
api-1               |     resp = resource(*args, **kwargs)
api-1               |            ^^^^^^^^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/.venv/lib/python3.12/site-packages/flask/views.py", line 110, in view
api-1               |     return current_app.ensure_sync(self.dispatch_request)(**kwargs)  # type: ignore[no-any-return]
api-1               |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/.venv/lib/python3.12/site-packages/flask_restx/resource.py", line 41, in dispatch_request
api-1               |     resp = meth(*args, **kwargs)
api-1               |            ^^^^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/controllers/console/wraps.py", line 263, in decorated
api-1               |     return view(*args, **kwargs)
api-1               |            ^^^^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/libs/login.py", line 160, in decorated_view
api-1               |     return current_app.ensure_sync(func)(*args, **kwargs)
api-1               |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/controllers/console/wraps.py", line 69, in decorated
api-1               |     return view(*args, **kwargs)
api-1               |            ^^^^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/controllers/common/wraps.py", line 91, in decorated
api-1               |     return view(*args, **kwargs)
api-1               |            ^^^^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/controllers/console/app/wraps.py", line 167, in decorated_view
api-1               |     return view_func(*args, **kwargs)
api-1               |            ^^^^^^^^^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/controllers/console/wraps.py", line 564, in decorated
api-1               |     return view(self, current_user, *args, **kwargs)
api-1               |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/controllers/console/wraps.py", line 356, in decorated_function
api-1               |     return f(*args, **kwargs)
api-1               |            ^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/controllers/console/app/workflow.py", line 1129, in post
api-1               |     workflow = workflow_service.publish_workflow(
api-1               |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
api-1               |   File "/app/api/services/workflow_service.py", line 483, in publish_workflow
api-1               |     WorkflowAgentPublishService.validate_agent_nodes_for_publish(
api-1               |   File "/app/api/services/agent/workflow_publish_service.py", line 77, in validate_agent_nodes_for_publish
api-1               |     WorkflowAgentNodeValidator.validate_published_workflow(session=session, workflow=draft_workflow)
api-1               |   File "/app/api/core/workflow/nodes/agent_v2/validators.py", line 67, in validate_published_workflow
api-1               |     cls._validate_workflow(session=session, workflow=workflow, require_binding=True)
api-1               |   File "/app/api/core/workflow/nodes/agent_v2/validators.py", line 84, in _validate_workflow
api-1               |     raise WorkflowAgentNodeValidationError(
api-1               | core.workflow.nodes.agent_v2.validators.WorkflowAgentNodeValidationError: Workflow Agent node 1756347762231 requires a binding before publishing.
nginx-1             | 10.92.52.218 - - [03/Jul/2026:02:03:31 +0000] "POST /console/api/apps/214005a9-8312-4d83-a4d3-f75f63b2f955/workflows/publish HTTP/1.1" 400 122 "http://10.xxx.xx.37/app/214005a9-8312-4d83-a4d3-f75f63b2f955/workflow" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36" "-"
api-1               | 2026-07-03 02:03:35.344 WARNING [Dummy-509] [version.py:61] 7de3585c0c35553fbeac4076e8a5017d - Check update version error: timed out.

2. Additional context or comments

No response

[VectorPeak]

This looks like a publish-time validation issue on the Workflow Agent node, not an nginx issue. The screenshot shows Dify is blocking publish because node 1756347762231 has no agent binding attached.

AGENT_BACKEND_USE_FAKE=true / AGENT_BACKEND_FAKE_SCENARIO=success can make the agent backend path return a fake success, but it does not fill missing workflow node metadata. After upgrading to 1.15.0, the publisher appears to require every Workflow Agent node to have a valid binding before the draft can be published.

A practical workaround is:

1. Open the workflow editor.
2. Find the Workflow Agent node with ID 1756347762231 - exporting the DSL and searching for that ID is usually the fastest way.
3. Open that node in the UI and re-select/re-bind the agent configuration/model/provider/tool settings.
4. Save the draft, then publish again.
5. If the node was created in an older version and still fails, delete and recreate only that Agent node, then reconnect the edges.

If this still reproduces after rebinding, the useful info to add would be the exported workflow DSL around node 1756347762231 and the full API traceback after the truncated current_ap... line. That should make it clear whether this is a migration gap from 1.10.1-fix.1 to 1.15.0 or a validation bug in the publish flow.

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