How to remove random name generator?

[Thunderup]

I just use official roster and change a player's name to " Jayson Tatum". However, sometimes when I save the roster, "Tatum" will be change to another random name. I know this may because "Tatum" is not in the database of 2k17, but I just wonder how others, like SiC2K and Simonn-Lee create lastest roster with right name. May be use limnono tool (But the name will still be changed)? Maybe Cheat Engine(I don't know how to use it, can anyone teach me)?