[Koha] Update a field using SQL

[CTS-Programmer 3 (Paul Dokken)]

Hi am running Koha 3.18.  I want to run some SQL queries to update some fields.  When I try and run a simple query like UPDATE item SET PRICE = 2.00 WHERE BARCODE = '37000001' it just says executing query until I stop it. I am using MySQL Workbench from the Koha host and running under root user.  Anything special I have to do?

Thanks, Paul