You achieved the highest possible influence with one of your companions.
When having conversations, you will get a few options to choose from. Some options will give you positive influence with specific members of your squad, and you will want to aim to fill up the influence of just one of your squad members. You will also gain influence for completing quests with that companion.

There is a glitch almost at the very end of the game which you can use to max out your influence with one or all of your squad. After defeating Jeyne, you will end up back at the Legion chapter house. After travelling down stairs and towards the East Forest, you will be greeted by a cut scene of some burning debris falling behind you to prevent you from going backwards. You will be standing next to a save, and will have two doors in front of you that you must go through to get outside. Save the game and then travel through the doors, to which you will be greeted by kind words from your companion and gain influence with them. Head back to the save and save again - reload it and head through the door again, making sure to spam RB so that it closes and opens again. Save again and repeat until you have full influence with your companion.

MyPetWorm Credits: PS3 player Frogcat.