xavier-GitHub76 opened a new issue, #40934:
URL: https://github.com/apache/superset/issues/40934
### Bug description
I have an error when generating permalinks in Apache Superset version 6
### Context and Observations
#### Dashboards created directly in v6
Permalink generation works normally, regardless of their level of complexity
:
- Without tabs.
- With tabs (1 level).
- With nested tabs (multiple levels).
#### Dashboards imported from v5:
Systematic error, but only on one dashboard when generating a permalink,
with the following message:
```
{
"message": "{'activeTabs': {2: ['Field may not be null.']}}"
}
```
### Consequence
After this error, permalink generation stopped working for all dashboards,
including those that previously worked.
### Temporary solution
Refreshing the page (F5) restores functionality for dashboards not affected
by the error.
However, the imported dashboard remains blocked.
### Additional elements
[dashboard_export_20260610T120033.zip](https://github.com/user-attachments/files/28794795/dashboard_export_20260610T120033.zip)
The problematic dashboard consists only of static elements (charts,
datasets, and database connections were deliberately removed to isolate the
problem).
### Attachment
Export of the concerned dashboard (file attached to this message).
### Screenshots/recordings
https://github.com/user-attachments/assets/beb1a954-2e25-441a-8ca3-dd3b7707f312
### Superset version
master / latest-dev
### Python version
3.9
### Node version
16
### Browser
Chrome
### Additional context
_No response_
### Checklist
- [ ] I have searched Superset docs and Slack and didn't find a solution to
my problem.
- [ ] I have searched the GitHub issue tracker and didn't find a similar bug
report.
- [ ] I have checked Superset's logs for errors and if I found a relevant
Python stacktrace, I included it here as text in the "additional context"
section.
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