In 6.30 /ip firewall connection remove not executed

RouterOS Beginner Basics
1

Hi.
In version 6.30 not execute

/ip firewall connection print
 3  S C     icmp     192.168.0.10          192.168.0.20                      3s               0bps      0bps            1            1              56              56
/ip firewall connection remove 3
action timed out - try again, if error continues contact MikroTik support and send a supout file (13)

In the previous version of the executable.
In the version 6.30.1 of the same.
Where support contact?