Jumping in to provide a bit of context, the token bridge smart contracts are controlled by the Arbitrum DAO’s upgrade executor.
Before the protocol got decentralized, the mapping in the bridge was set to block this token from being bridged as the team was preparing to go Live in Arbitrum.
Since then, control of the token bridge was transferred to the DAO and to unblock the team, a governance action is needed.
There are also other tokens in this state which teams might be interested in unblocking.