Configuration not working on CE7800

Hi,

We want to add interface 40GE1/0/9 to Eth-trunk 1. As you can see below, the following error occurs.

[~CE-40GE1/0/9]eth-trunk 1
Error: The parameter of trunk command is invalid, because the trunk has added member of other port-type.
The error port is 40GE1/0/9.

If we check the interface, we see that no configuration is under this interface.

[~CE-40GE1/0/9]dis this #
interface 40GE1/0/9 #
return

We check also Eth-trunk and no interface is added.

Please, any suggestions about this error?

Thanks in advance!