Unknown import path: ‘join

Hello, I am a beginner. I am using influxdb 1.8.3 and Grafana 9.2.3. I am trying to use inner join to join two flux queries, and encounter “Unknown import path: ‘join’”. I have no idea how to check my flux version. Don’t know how to solve it. I watched your videos, which are very helpful for me to create the queries. I need to get import packages work because I need to import them. By any chance, could you please help? My InfluxDB and Grafana are running on the same Ubuntu 20 VM without docker. Thanks!

Join data in InfluxDB with Flux | InfluxDB OSS 2.6 Documentation should point you
in the right direction, however I doubt that this function is available in
InfluxDB 1.8 - you would need to upgrade to 2.x