Just by removing “channel-group” from the interface configuration.
! —- current SAMPLE config
Interface GigabitEthernet1/0/1
channel-group 15 mode active
switchport mode trunk
Interface GigabitEthernet1/0/2
channel-group 15 mode active
switchport mode trunk
Interface GigabitEthernet1/0/3
channel-group 15 mode active
switchport mode trunk
!
! —- FIX
Interface range GigabitEthernet1/0/1-3
NO channel-group 15 mode active
NO switchport mode trunk
!