If a person has max bodyguards they get a message reading: 

This guy will put you over your BG cap, sorry :(

My suggestion is two options. 

Option 1: Replace with a lower trained bodyguard and or upkeep a single body guard fully when such bodyguard has gone without such period of upkeep.

Option 2: This a far fetch, but retrieve such body guard that voids such bodyguard so it wont go over the limit. At this time the user would message Admin with the name of the bodyguard and get sent a Insta bg as gift for later use.

Pros:

* You still end up with a fully loaded bodyguard with both options.

* With the rareness of these via the jails (At least for me), if your maxed on bodyguards you will not lose it.

Cons: 

* Bodyguard name could be sent  to another person who didn't earn it versus the user who did. <---- Unless there is a way of tracking when a user loses out of getting the bodyguard because they are maxed out.

All for replacing one of your existing ones with the LB, +1 from me.