Golikum commented on issue #22390:
URL: https://github.com/apache/superset/issues/22390#issuecomment-1700969063

   I have encountered this problem and seem to have found the cause.
   The field that use as default datetime in dataset, must be NOT Nullable.
   For Clickhouse you can use assumeNotNull(your_field) in your source or 
calculated column.
   Don't remember to synchronize columns in the dataset when you change that 
datatype of the field in your dataset.


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