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Gi3/2 is not compatible with Po2 and will be suspended (vlan mask is different)

Getting above error while adding new VLAN in to trunk port in cisco catalyst 4507R core switches and port change suspented. I have port channel configured..
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If i need to add new VLAN to the trunk port, do i need to add that VLAN to port channel first ot directly apply to the interface?
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Device is Cisco 4507R with iOS 12.2, this the second time I doing this tomorrow and need to go smoothly.
Can you post the relevant interface and portchannel configs?
I have done it by changing port channel configuration, changes reflected by itself on interfaces belongs to.. No drop of connectivity.. So smooth.. Thanks for your help..