cvs server: Up-to-date check failed for `maint-guide.sgml'

[Josip Rodin <joy@cibalia.gkvk.hr>]

Hi,

I typed:

$ cvs commit -r 1.5 maint-guide.sgml

Edited the changelog, saved it, exited, and after some time got this
message:

cvs server: Up-to-date check failed for `maint-guide.sgml'
cvs [server aborted]: correct above errors first!
cvs commit: saving log message in /tmp/cvs01258baa

What the fsck does that mean? How can I fix that?
 
-- 
enJoy -*/\*- don't even try to pronounce my first name