[Dovecot] wrong dovecot GID while upgrading

[Zbigniew Szalbot]

Hello,

I tried to upgrade dovecot from 1.0.rc7 to rc22 but I got this error at
the end of the upgrade process:

Dovecot has reserved the groupname 'dovecot' and gid '143':
ERROR: groupname 'dovecot' already in use by gid '1003'
Please resolve these issues and try again:
Either remove the conflicting group or if you wish to continue using a
legacy gr                                                                 
           oup override DOVECOT_GID.
*** Error code 1

Stop in /usr/ports/mail/dovecot.

So I went to /usr/ports/mail/dovecot and edited the Makefile to change the
GID into:

DOVECOT_UID?=   1003
DOVECOT_GID?=   1003
SCRIPT_ENV+=    DOVECOT_UID=${DOVECOT_UID} \
                DOVECOT_GID=${DOVECOT_GID}

I saved the makefile and ran portupgrade again but I got stopped by
exactly the same error. I'd appreciate suggestions how to resolve this.

Thank you!

-- 
Zbigniew Szalbot