You can find SQL installation file for MEC tables in the following path:
And you should read the code to find out what happened, if you are not familiar with SQL syntax, you need to find an expert to help you. Or use our customization services.
First, find mec_events then find post_id (event id):
You can see what is the repeating for this event:
Then on the mec_dates table, you can find all date occurrences of the events:
If you use the “Edit Per Occurrences” option, please check the “mec_occurrences” table
and that’s all.