Why can't the AB key and B key of the security door be inserted into the lock core from the outside (the house has just been renovated, but the teeth of the B key are different from those of the A key

Why can't the AB key and B key of the security door be inserted into the lock core from the outside (the house has just been renovated, but the teeth of the B key are different from those of the A key)? Can you insert it from the inside? It should be AB. If it is wrong.

Because there may be some unfinished projects in the room after the installation of the security door, A needs to be handed over to the construction unit for construction. Then maybe the property mixed up the keys after the construction. Of course, there is also a rare possibility that the AB key is mixed with the lock core when it leaves the factory.

It is recommended to find a property or directly find a manufacturer.