Repeated Program Listings in 'Open With' dialog

system
software

#1

I just removed a snap package of Okular because of the read and write restrictions; after removal, I installed from the MATE repositories with APT, as well as the ODT & extra file format backends. I tested functionality and it works, so I was about to change my default PDF viewer to Okular but I noticed twenty-five entries of Okular in the Open With dialog.
This doesn’t appear to be normal; at least it shouldn’t be. I think there should only be one entry for Okular. Could the backends be creating the extra listings in the Open With dialog?
Thanks in advance for any information!