Serial Print makes code work. Why?

after searching some more I found a post that said to look at the compiler warning and it might give you clue at what might be giving you the problem.

Something is deprecated but I don't have the knowledge to understand it, can anyone point me in the right direction.

/Users/admin/Documents/Arduino/Petal_Stapler/Petal_Stapler.ino:189:101: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]
   char *titleStr[row * col] = {"4", "6", "8", "9", "12", "16", "Load", "1", "x", "xx", "xxx", "xxxx"};
                                                                                                     ^