Mysql inmport Calendar Plugin Isuse

[czop135]

Hi,
I'm trying to install Calendar plugin but when I'm trying to import mysql I'm getting following error:

mysql -u root -p roundcubemail < /usr/share/roundcube/plugins/calendar/drivers/database/SQL/mysql.initial.sql
Enter password:
ERROR 1005 (HY000) at line 14: Can't create table 'roundcubemail.calendars' (errno: 150)

Mysql server version is: Server version: 5.5.46-0ubuntu0.14.04.2 (Ubuntu)
Roudcube version: Roundcube Webmail 0.9.5

Please help.