I want to create section which should be same on all pages where I have added

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4

Just in case anyone else has the same issue: it appears to persist page specific section data, each JSON Template needs its own liquid file in the sections directory.

{
  "sections":{
    "main":{
      "type": "Specific Liquid File Name"
    }
  },
  "order":[
    "main"
  ]
}