A number of discussions on this site have involved people who were told after they signed a lease that they didn't own the mineral rights. There have also been cases where someone doesn't think they have mineral rights, but the lessee tells them they do own the rights and offers a lease.
I know some leases have a clause requiring the lessor to "defend the title," i.e. pay the lessee's legal expenses in case of disputes.
This sounds really dangerous.
Is it common to sign a lease that says, in essence, "I convey any mineral rights I own for this property. I don't claim to own these rights. I'm not responsible for any damages if it turns out I don't own these rights."
i.e. lessee does the legal stuff regarding mineral ownership and I don't have any responsibility if they get it wrong.