I installed AMC from this PPA on my machine which is running Ubuntu 18.04LTS.

However, when I update documents from inside AMC GUI I get this WARNING message (see attachment). It tells me that the AMC version is different from the LaTeX style file version. The automultiplechoice.sty is located in this path:/usr/local/texlive/texmf-local/tex/latex/AMC/. I think that it is installed when I already installed AMC using the above PPA repo.

So how did I get into this warning message in the first place? What went wrong with my installation. Please help me, I must prepare the sheets the next exam in two days and I am afraid as this WARNING message also points out that I may run into issues later on using AMC when I do capturing and scoring. The documents were otherwise updated successfully, but I won't print the sheets (anonymous 75 copies with different ID) until someone helps me out to clear up this WARNING message and how I can fix it. I don't want to take the risk of printing the sheets and then running into troubles after the exam. I look forward to your help soon.