How to disable Spanning Tree Protocol on Bridge Group interface on CISCO Router.

Problem :
Network traffic is slow, when you start the STP on bridge group interface on router.

Log message :
000183: .Aug 13 10:08:11.549: STP: Serial0/0/0.1 is looped back
000184: .Aug 13 14:41:53.192: STP: Serial0/0/0.1 is looped back
000185: .Aug 13 16:20:01.836: STP: Serial0/0/0.1 is looped back
000186: .Aug 13 16:39:01.308: STP: Serial0/0/0.1 is looped back

How to fix :

# configure terminal
(conf) # interface serial 0/0/0.1
(conf) # bridge-group 1 spanning-disabled
(conf) # end
# write memory