This petition was rejected

The Government e-Petitions Team gave the following reason:

There's already a petition about this issue. We cannot accept a new petition when we already have one about a very similar issue.

You are more likely to get action on this issue if you sign and share a single petition.

You might like to sign the following petition:

Increase penalties for knife crime offences
petition.parliament.uk/petitions/618505

If you'd like a petition calling specifically for a 10-year sentence, you could start a new petition making clear if you'd like to see a 10-year minimum sentence, or a mandatory 10-year sentence for all cases.