Repairing Empty System Name Field in Page Builder

I edited a block in page builder and left the system name field empty, not knowing this would be an issue. But now I can't edit it because there's no name to click to open it to edit. 

Boonex support told me this: "This issue can happen if the System Name field is left empty when editing a block in the Page Builder. It can only be repaired from the database." But didn't tell me how to repair it. Please help!

Hello!

You need to execute this query in your Dolphin database:

UPDATE `sys_page_compose` SET `Caption`='_[new name of block]' Where `Caption` = ''

After this go to admin panel->tools->cache area and clear Page blocks cache.

With the best regards, Leonid