package version went backwards

[Andreas Oberritter <obi@opendreambox.org>]

Hi,

the following message just appeared after adding a bbappend:

ERROR: Package version for package sysvinit-inittab went backwards which
would break package feeds from (0:2.88dsf-r6 to 0:2.88dsf-r6-dream1)

Is this really true? I thought that anything appended to X would be a
higher version than X. If it's true, for example because the dash has a
special meaning, does anybody have a list of valid or invalid characters
for PR? I guess I could simply omit the dash.

I'm using abbreviated layer names as suffix in my bbappends, because it
makes it easier to see whether the package was modified by my layer(s)
than with PRINC.

Regards,
Andreas