[calendar_plus] ical import error

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Token: 9153ef3f1f1da4f93864b07e3ee82782 (Don't modify this token!)
Version: 4.0.26 (02-01-2015)
PHP: 5.4.36-0 deb7u1
RCMAIL: 1.0.4
Database: pgsql
SERVER: Apache/2.2.22 (Debian)
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I.  Issue Description:
error after try to import ical calendar 
[03-Jan-2015 16:58:33 +0100]: DB Error: [7] ERROR:  invalid input syntax for 
integer: ""
LINE 1: ...ars_ical_props p WHERE p.obj_type = 'ical' AND p.obj_id = ''
                                                                     ^ (SQL Query: SELECT * FROM calendars_ical_props p WHERE p.obj_type = 'ical' AND p.obj_id = '') in /var/www/roundcube/program/lib/Roundcube/rcube_db.php on line 467 (POST /?_task=calendar&_action=calendar?_task=&_action=)

here is my ics source 
https://mozorg.cdn.mozilla.net/media/caldata/SlovakHolidays.ics

II. Steps to reproduce the Issue:
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Original issue reported on code.google.com by mino.ku...@gmail.com on 3 Jan 2015 at 4:58

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This is related to issues in PostgreSQL database scheme. Please follow this 
thread for updates:

https://forum.myroundcube.com/topic/187-new-calendar-plugin-is-not-working/

Original comment by roland.l...@gmail.com on 3 Jan 2015 at 5:19

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Original comment by roland.l...@gmail.com on 3 Jan 2015 at 5:19

• Changed state: Accepted

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Original comment by roland.l...@gmail.com on 4 Jan 2015 at 4:47

• Changed state: Fixed