# LeaseHasNoEndBlock (/docs/errors/chain/LeaseHasNoEndBlock)

The lease being terminated is perpetual (its `end_block` is None), so it can never be ended this way. Check the lease's `end_block` field in `SubnetLeases` for the given lease id.

Declared by the `SubtensorModule` pallet; it classifies to the semantic code [`invalid_argument`](/docs/errors/invalid-argument).

## Remediation [#remediation]

Check the argument values against the operation schema

The same explanation is available in the terminal: `btcli explain LeaseHasNoEndBlock`.