It will very hard to get help with so little details.
I suggest you report https://dev.tiki.org/Make-a-wish where you can give more details and even create an instance to reproduce.
If this is specific to your database and need someone to look at your data (or you are in hurry) I suggest you to hire a consultant. You can find them at : https://tiki.org/Consultants
Hope you get a fix for this quick !