[sunir]

You need the IP records for jurisdictions that require long term retention for law enforcement requests including copyright infringement.

So you must delete them and also keep them.

[confounded]

Do you know which jurisdictions and laws that includes?

This sounds like the Investigatory Powers Act in the UK, though I haven't heard of similar laws in other liberal democracies.

[nawitus]

https://en.wikipedia.org/wiki/Data_Retention_Directive