Ubuntu – Accidently installed two versions of swi-prolog, need help to fix it

Alright, I have this problem where I installed two different versions of swi-prolog.

I manually installed swi-prolog (swipl) version 5.10.4 from a tar-file, which I see now is a stupid thing. (I can't remember why I did this exactly, but that is besides the point.)

Then I wanted to get the newest version of prolog, so I followed these steps:

sudo apt-add-repository ppa:swi-prolog/stable
sudo apt-get update
sudo apt-get install swi-prolog

Now if I do

swipl --version

I get

SWI-Prolog version 5.10.4 for x86_64-linux

And if I do

/usr/bin/swipl --version

I get

SWI-Prolog version 6.4.1 for amd64

I only want the 6.4.1 version on my computer.

I searched the internet for hours, but I couldn't find out how to solve the problem. (Maybe I've been searching for the wrong terms/tags, I don't know..)

So, I found out that the 5.10.4 version can be found at /usr/local/bin/ whereas the 6.4.1 version is at /usr/bin/. Can't I just rm the 5.10.4 version from /usr/local/bin/ then? Or is that not clean, e.g. does it leave obsolete files somewhere on disk?

I just deleted the file swipl at /usr/local/bin/swipl with the rm-command.
Now I get the 6.4.1 version whenever I call swipl, but I still wonder if this is a good solution.

The output of type swipl is swipl is /usr/local/bin/swipl and the output of dpkg -S $(type swipl | awk '{print $3}') is dpkg-query: no path found matching pattern /usr/local/bin/swipl.

I untarred the .tar-file and I ran make from the source (src folder) that was in the .tar-file. Then installed the program using sudo make install.