
Originally Posted by
mc12345678
Model number won't specifically resolve the issue and is not specific to causing the observed response(s).
Does the store perhaps use products_sku and applied a suggested implementation that was posted earlier in this thread? Basically, if search for EP4_DB_FILTER_KEY to see if it is used outside of the core files in the root of the admin, the extra_functions folder of the admin and/or the admin's modules folder.
Note for others, the plan is/was that if an alternate filter option were desired/to be used, then it be added to the selection list in the configuration menu. The earlier "add-on" was just that, an additional set of code to show that it could be possible and how it might be implemented.