Refer to the exhibit. An engineer ts building a new Layer 2 LACP EtherChannel between SW1 and SW2, and they executed the given show commands to verify the work. Which additional task must be performed

While VLAN 300 needs to be allowed on SW1's port-channel 1, the command `switchport trunk allowed vlan 300` would *replace* all other allowed VLANs with only VLAN 300, which is incorrect as the current allowed VLANs on SW1's port-channel 1 are `1-299, 301-4094`.

SW2's Fa0/2 already allows VLAN 300 (indicated by `1-4094`), so configuring `switchport trunk allowed vlan add 300` on SW2's Fa0/2 is redundant and would not fix the `not-in-sync` issue on SW1.

The exhibit shows that VLAN 300 is allowed on SW2's Fa0/2 (a potential channel member), but not on SW1's Fa0/2 or SW1's Port-channel 1. To resolve the `not-in-sync` state and allow the bundling of Fa0/2 into the LACP port-channel, VLAN 300 must be added to SW1's Port-channel 1 using `switchport trunk allowed vlan add 300` to match the configuration of SW2.

The configuration should be applied to the port-channel interface (Po1) on SW1, not directly to the individual physical interface (Fa0/2) on SW1, as port-channel member interfaces typically inherit or must match the port-channel configuration.