Did you update to v1.3? If not, then that's why and you'll have to update.

The instructions for updating your masternode can be found at https://github.com/bulwark-crypto/Bulwark-MN-Install

Specifically this portion:

Updating Node
To update your node please run this command and follow the instructions. Please note that this script must be run as root.

bash <( curl https://raw.githubusercontent.com/bulwark-crypto/Bulwark-MN-Install/master/update_node.sh )