I had influx 1.7 version which was working fine and after update to influxdb2, my old is not showing but from the day I update the influx2 its showing data. What should I do?

I had influx 1.7 version which was working fine and after update to influxdb2, my old is not showing but from the day I update the influx2 its showing data. What should I do?

_Originally posted by @warrng in https://github.com/influxdata/influxdb/issues/10287#issuecomment-1261956756_

Start by reviewing the linked original issue and the reported upgrade from InfluxDB 1.7 to InfluxDB 2. The issue names no files, tests, or entry points; first clarify the migration path and how the old data was stored, then determine how to verify whether that data is accessible after the upgrade.

Written by the indexing model from the issue text.