Basement access to electric panels

[Krista Manna]

I have a two family where the electric panel for the upstairs tenant is in the basement (which the downstairs tenant will be renting). There is a bulkhead which has a lock on the outside but it also has a deadbolt on the inside. I was thinking of giving a key to the lock and removing the deadbolt.

The first floor tenants access the basement through a locked door and set of stairs.

The door panel itself is not able to accept an internal device (aka like a regular exterior door) because it’s too thin.

Thoughts on if removing the deadbolt and giving both tenants the keys is the best solution? Thanks.