Creating a new database might solve that trouble but I'd recommend sending a log file to us anyway as there may be something we see in there that's potentially going to cause you ongoing issues.
Please attach a sample of original hand history and tournament summary files for these errors to a Support Ticket so that we can investigate that for you.
The only thing I can suggest is if you enable the 'Stats From Current Cash Stake Only' option in HUD options then in addition to the stake filter that will also filter the hands by the table size so hands played at 6max tables aren't mixed with hands played at full ring tables.
The hands with the error will have more than one player listed as showing exactly the same hole cards in the summary section so you'll need to either delete that line or change the showdown entry to "does not show cards" instead.
Tournament summaries are set to save and also "get hands from site while playing" ticked under import configuration. I dont see the tournament summaries though under Pokertracker 4- processed-Pokerstars-2017 folder though, I can only see hand histories. Summaries supposed to be in the sam...