Go to https://sentry.xai.games/#/assign-wallet/[insert-other-operator-public-address] (be sure to edit this URL)
Click "Assign wallet to Sentry"
Sign the transaction
Then tell the other user to stop & restart their Sentry (or if they are using a CLI, ask them to run the boot-operator command again).
Go to https://sentry.xai.games/#/unassign-wallet/[insert-other-operator-public-address] (be sure to edit this URL)
Click "Unassign wallet from Sentry"