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1 
{
  "browser-info": {
    "language": "en-GB",
    "platform": "MacIntel",
    "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36",
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      "tag": "v0.34.3",
      "date": "2020-02-25",
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2

Hi @himanshucred
It seems like someone else just reported similar, but without any warnings/errors from the log or any other details, so maybe you can supply with more information:
https://github.com/metabase/metabase/issues/12312
Latest release is 0.35.2
And you should migrate away from H2 if you’re using Metabase in production:
https://www.metabase.com/docs/latest/operations-guide/migrating-from-h2.html