MySQL Error adding backlog item

MySQL Error trying to add a new backog item right after a CSV import (not sure if happens in non-imported backlogs):

Mysql::Error: Lock wait timeout exceeded; try restarting transaction: UPDATE `backlog_items` SET `position` = 1 WHERE `id` = 230061264.

This error takes some time to appear in an javascript alert window after

1) Pressing the "create" button and
2) Waiting for the new "Item Form" to dim and undim.

I just started as CTO of a company and was thinking of standardizing on BananaScrum for one of our projects. The project already has a backlog with 172 items. I am worried about these types of bugs (the kinds of which I never found before after using BananaScrum for about 1 year).