[Haskell-cafe] Edited page on HaskellWiki cannot be stored

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I am trying to add an event to the events template on HaskellWiki; when pressing the  "Save changes"-button, I get the message:
  Database error
  A database query error has occurred. This may indicate a bug in the software.
  [e0eb045a214da98ee73cb349] 2025-06-24 14:08:03: Fatal exception of type "Wikimedia\Rdbms\DBQueryError"
 
Can anyone have a look at this?
 
Henk-Jan van Tuyl
 
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