Error when overwriting block tabs

[iskrisis]

When setting tab: false in extended block blueprint:
blocks/text.yml

name: Text
tabs:
  content:
    fields:
      text:
        type: text
  test:
    fields:
      test:
        type: text

blocks/test.yml

extends: blocks/text
name: Test
tabs:
  test: false

Error happens
Return value of Kirby\Cms\Blueprint::extend() must be of the type array, bool returned kirby/src/Cms/Blueprint.php line: 199

[bastianallgeier]

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