Cause: This thing happens when an commit or update is interrupted in the middle.   Solution:  Just Clean Up  by SVN.Then update and commit .   It will work.    If it doesn't work then go into the .svn folders /pristine/IntegerValue.   * IntegerValue may be a random number of a folder on which todays info of changes will stored.     Now from that folder by date of modified find the .svn-base file which will look like    00a0a66811fd94042c2a2ae86b43700c86968ace.svn-base  .   Then Just delete it/ move it to other folder.  Then update and commit .  It will work.   Worst-Case:   If it doesn't work then you need to Checkout again and your work will vanish.  :(
Network programming and scalable micro-services in Azure