"unha vez vello, dúas veces neno" meaning in Galician

{
  "etymology_text": "Attested since the 19th century.",
  "head_templates": [
    {
      "args": {
        "1": "gl",
        "2": "proverb"
      },
      "expansion": "unha vez vello, dúas veces neno",
      "name": "head"
    }
  ],
  "lang": "Galician",
  "lang_code": "gl",
  "pos": "proverb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Galician entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Galician proverbs",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "Old man of the white mane: the one who said \"once and old man, twice a child\" was not wrong. I don't know what the hell it's good to you the experience you gained with age. Why are you getting into trouble?",
          "ref": "1884, O tío Marcos da Portela, II, 51, page 6",
          "text": "Vello das brancas gadellas: non s'enganou o que dixo que unha vez vello dúas veces neno. Non sei de qué xuncras lle sirve a esperencia que adiquiriu cos anos. ¿Pra qué se anda metendo en enfonduras?",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Literally, “once an old man, twice a child”"
      ],
      "id": "en-unha_vez_vello,_dúas_veces_neno-gl-proverb-merjsDQ~",
      "raw_glosses": [
        "(idiomatic) Literally, “once an old man, twice a child”"
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "unha vez vello, dúas veces neno"
}

{
  "etymology_text": "Attested since the 19th century.",
  "head_templates": [
    {
      "args": {
        "1": "gl",
        "2": "proverb"
      },
      "expansion": "unha vez vello, dúas veces neno",
      "name": "head"
    }
  ],
  "lang": "Galician",
  "lang_code": "gl",
  "pos": "proverb",
  "senses": [
    {
      "categories": [
        "Galician entries with incorrect language header",
        "Galician idioms",
        "Galician lemmas",
        "Galician multiword terms",
        "Galician proverbs",
        "Galician terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "english": "Old man of the white mane: the one who said \"once and old man, twice a child\" was not wrong. I don't know what the hell it's good to you the experience you gained with age. Why are you getting into trouble?",
          "ref": "1884, O tío Marcos da Portela, II, 51, page 6",
          "text": "Vello das brancas gadellas: non s'enganou o que dixo que unha vez vello dúas veces neno. Non sei de qué xuncras lle sirve a esperencia que adiquiriu cos anos. ¿Pra qué se anda metendo en enfonduras?",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Literally, “once an old man, twice a child”"
      ],
      "raw_glosses": [
        "(idiomatic) Literally, “once an old man, twice a child”"
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "unha vez vello, dúas veces neno"
}