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#ask-community
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# ask-community
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Daniel Galea

07/28/2023, 12:06 PM
Hi, I just upgraded Dagster to the latest version (I am hosting it myself on Kubernetes). Everything was working fine for a few hours and all of a sudden I am getting this error whenever I try to load my pipeline runs. Does anyone know why this happens and how I can fix it?
Operation name: PipelineRunsRootQuery
Message: Cannot return null for non-nullable field Run.mode.
Path: ["pipelineRunsOrError","results",0,"mode"]
Locations: [{"line":29,"column":3}]
Stack Trace:
File "/usr/local/lib/python3.7/site-packages/graphql/execution/execute.py", line 541, in execute_field
return_type, field_nodes, info, path, result
File "/usr/local/lib/python3.7/site-packages/graphql/execution/execute.py", line 621, in complete_value
"Cannot return null for non-nullable field"
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chris

07/28/2023, 7:34 PM
This looks like your dagit and user code server might be out of sync. Did you also upgrade dagit to the latest version?
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Daniel Galea

07/31/2023, 9:45 AM
That was the problem 🙂 I updated Dagit through helm and everything worked after, thanks!
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