Error "fileid changed" when accessing files over NFS

The error happened because of wrong fsid value in /etc/exports.

I replaced the second line with this one:

/export/ebs THIRD_SERVER_IP(rw,insecure,no_subtree_check,async) SECOND_SERVER_IP(rw,nohide,insecure,no_subtree_check,async)

and now it works.