Is Source Control needed for single user

After receiving the error message unable to successfully checkout the following assets message for the unth-time, I began to wonder what the heck does this mean. Normally this happens to me when UE4 crashes or my system locks-up, causing me to hard reboot my computer. Sometimes I will notice I have lost some of my work, leaving me to reimport lost assets, and other times my assets are fine. Therefore this really confuses me, what the heck this means, up until now, I think I understand that this feature is for locking team members from editing the same assets at the same time. If this is the case, and I am the only user, is it safe to turn this off?