This comes because of the change of ps4 to bedrock. Now Ps4 has a data problem where if it is autosaving and the ps4 turns off, the data gets corrupted and there is no way to recover your world. 

So that is an issue people like me have, Because my electricity connection is awful, so sometimes the power goes off unexpectedly. So I disable autosave to prevent data loss. Now bedrock has "no disable autosave" option, I already got the data corruption message. 

My advice is to get the option of "disable autosave", or let us get to the last saved "uncorrupted" file... it is dumb that if a file gets corrupted I can't get the world back... every time the message " The data has been corrupted" you should get an option that  lets you open the last uncorrupted file, so that while you loose a couple of hours of progress... you don't loose the whole world that took weeks to make. 

The only option you get right now is: Delete the save or ok