[Koha] Error adding new records

[Blake Library]

Hi all. I'm using Koha version 3.11.00.008

When I go into cataloguing and "Add new record" everything looks ok, but
when I search for the record after saving I cannot find the data I entered.
I can edit and delete items but there seems to be a problem with the
records.

Any ideas about where the problem might be - server, MySQL, Koha version
bug?

Have lots of books waiting to be added.

Cheers


Mark