Thanks @mistercreate, yet I think that it should be created other way to control backups.
Notice that I was working in 2 pages, after I made changes in those 2 pages the error occurred, so I don’t know what could have happened, and so I lost the changes I made even though they could have not been the cause.
In fact I don’t know what to suggest, but I think that should have someway to control backups manually, or have access to the code!
Thanks