How long to keep IR35 insurance up?

[OneManBand]

Company is still trading. Contracting through company, but outside.

The insurance in question is the tax liability cover (TLC35) from Qdos.

But do I really have to have the insurance for as long as the company trades? Isn't there a limit of 6 years after which you no longer...

[OneManBand]

Only regret is not starting sooner.
Pension pot had £550k before the markets tanked... not going to look until the markets recover again.
50 years old, no debts... so haven't done too badly, investing purely on ETFs and investment trusts.

[OneManBand]

My Qdos IR35 insurance is up for renewal shortly. Is there still any point in keeping it for the sake of potential past investigations?