Cause of the error message indicating that the source port is already occupied during manual creation of a logical fiber upon a failure to synchronize logical fiber connections on the U2000

The cause is as follows: Before you synchronize inter-NE logical fiber connections, the NE ID has been changed but the created inter-NE logical fiber connections have not been deleted. As a result, the logical fiber connections recorded in the database on the NE side are incorrect and cannot be synchronized to the U2000.

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