[Zope] Is it posible to delete the Data.fs.old?

I'm wondering about this because I have a Data.fs file which its size is aprox 1Gb and it'll become bigger. On the other hand, the size of Data.fs.old is almost the same. So, I have two files that have the same contents with the same sizes. I think that's a waste of space. Is there any consequence in erasing this file? Thanks in advanced, Josef.