Migration of postgres integration to chirpstack V4?

I used Chirpstack V3 with postgres integration for 1 year data collection of counters on a server. I switched to a new server
and succesfully used the migrationtool_v3_v4 to run a chirpstack V4 with all my data-settings from before.
Now for the integration i have on the V3-Version-Sever a chirpstack_as_events-Database with all the data collected with the V3 Stack.
What should i do to migrate this Data to the V4 postgres integration?
Can i copy the data directly to the V4 Database and use it?
Is the postgres-integration V4 different from the V3 postgres-integration?
How can i get the pg-integration V3 data to the V4 data

thanks for helping me

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