[wp-trac] [WordPress Trac] #53898: Duplicated 404 templates in the TemplatePanel

[WordPress Trac]

#53898: Duplicated 404 templates in the TemplatePanel
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 Reporter:  Mamaduka      |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Editor        |    Version:  5.8
 Severity:  normal        |   Keywords:
  Focuses:                |
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 The issue was initially reported on Github -
 https://github.com/WordPress/gutenberg/issues/33929.

 The original "404" template key is lost when we merge "Default template"
 into the available templates array. The `array_merge` will re-index/re-
 number keys with numbering values.

 Later, when we merge templates on the client-side, this causes duplicated
 "404" templates in the dropdown.

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Ticket URL: <https://core.trac.wordpress.org/ticket/53898>
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