Corrupted Data

Hi all,

Im having a problem with my Datafile for the last few days.    The data keeps corrupting and creating errors.

I can restore the data from a couple of days ago, check  it and there are no errors.  Then I work as normal, and when I go to do a backup it tells me its corrupted again.

I'm using the newest version of the software. 

However the error message (see below) is from a transaction that i've worked on, its something from ages ago.   

Any suggestions of what I can do????

Many thanks